Gnutls: gnutls: denial of service via heap buffer overflow in dtls handshake fragment reassembly
Priority MEDIUM 41CWE-130Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 43 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01263 69th percentileScored 2026-11-07
Fix Partial Red Hat: 35 advisoriesRed Hat: 43 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | 3.8.10-4.el10_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | 3.8.9-9.el10_0.19 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | 3.3.29-9.el7_9.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 3.6.16-8.el8_10.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 3.6.16-8.el8_10.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 3.6.14-10.el8_4.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 4.13-3.el8_4.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | 3.6.14-10.el8_4.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | 4.13-3.el8_4.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 3.6.16-5.el8_6.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 4.13-3.el8_6.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | 3.6.16-5.el8_6.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | 4.13-3.el8_6.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | 3.6.16-7.el8_8.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | 4.13-4.el8_8.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | 3.6.16-7.el8_8.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | 4.13-4.el8_8.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.10-4.el9_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.10-4.el9_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 3.7.6-21.el9_2.7 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | 3.8.3-4.el9_4.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 3.8.3-6.el9_6.4 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — | 412.86.202608241157-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — | 413.92.202609080414-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | 414.92.202608172040-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | 415.92.202608180329-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | 416.94.202608150307-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | 417.94.202608250221-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | 418.94.202608142238-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | 4.19.9.6.202608182320-0 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | 1791371080 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | 1791371069 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | 1791788287 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | 1791970484 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | 1791459707 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | 1791459711 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | 1791459759 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | 1789029076 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | 1791966259 | Patch available | CNA |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — | 1790598593 | Patch available | CNA |
| Red Hat | Red Hat AI Inference Server 3.2 | — | 1782951051 | Patch available | CNA |
| Red Hat | Red Hat AI Inference Server 3.2 | — | 1782951012 | Patch available | CNA |
| Red Hat | Red Hat AI Inference Server 3.2 | — | 1782951244 | Patch available | CNA |
| Red Hat | Red Hat Discovery 2 | — | 1782159791 | Patch available | CNA |
| Red Hat | Red Hat Discovery 2 | — | 1782166952 | Patch available | CNA |
| Red Hat | Red Hat Hardened Images | — | 3.8.13-1.hum1 | Patch available | CNA |
| Red Hat | Red Hat OpenShift AI 3.4 | — | 1790703542 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1781525684 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1781525671 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1781525693 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1781525739 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1787241211 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1787135742 | Patch available | CNA |
| Red Hat | Red Hat Update Infrastructure 5 | — | 1787241260 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 3.8.10-4.el10_2 Patch available CNA
- Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 3.8.9-9.el10_0.19 Patch available CNA
- Red Hat Enterprise Linux 7 Extended Lifecycle Support VendorRed Hat Affected — Fixed in 3.3.29-9.el7_9.1 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 3.6.16-8.el8_10.6 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 3.6.16-8.el8_10.6 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 3.6.14-10.el8_4.1 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 4.13-3.el8_4.1 Patch available CNA
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 3.6.14-10.el8_4.1 Patch available CNA
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 4.13-3.el8_4.1 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 3.6.16-5.el8_6.5 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 4.13-3.el8_6.2 Patch available CNA
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 3.6.16-5.el8_6.5 Patch available CNA
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 4.13-3.el8_6.2 Patch available CNA
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 3.6.16-7.el8_8.4 Patch available CNA
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 4.13-4.el8_8.1 Patch available CNA
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 3.6.16-7.el8_8.4 Patch available CNA
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 4.13-4.el8_8.1 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.10-4.el9_8 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.10-4.el9_8 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 3.7.6-21.el9_2.7 Patch available CNA
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 3.8.3-4.el9_4.6 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 3.8.3-6.el9_6.4 Patch available CNA
- Red Hat OpenShift Container Platform 4.12 VendorRed Hat Affected — Fixed in 412.86.202608241157-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.13 VendorRed Hat Affected — Fixed in 413.92.202609080414-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.14 VendorRed Hat Affected — Fixed in 414.92.202608172040-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.15 VendorRed Hat Affected — Fixed in 415.92.202608180329-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.16 VendorRed Hat Affected — Fixed in 416.94.202608150307-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.17 VendorRed Hat Affected — Fixed in 417.94.202608250221-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.18 VendorRed Hat Affected — Fixed in 418.94.202608142238-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.19 VendorRed Hat Affected — Fixed in 4.19.9.6.202608182320-0 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.17 VendorRed Hat Affected — Fixed in 1791371080 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.17 VendorRed Hat Affected — Fixed in 1791371069 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.17 VendorRed Hat Affected — Fixed in 1791788287 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.17 VendorRed Hat Affected — Fixed in 1791970484 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.18 VendorRed Hat Affected — Fixed in 1791459707 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.18 VendorRed Hat Affected — Fixed in 1791459711 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.18 VendorRed Hat Affected — Fixed in 1791459759 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.18 VendorRed Hat Affected — Fixed in 1789029076 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.18 VendorRed Hat Affected — Fixed in 1791966259 Patch available CNA
- Cert Manager support for Red Hat OpenShift release 1.20 VendorRed Hat Affected — Fixed in 1790598593 Patch available CNA
- Red Hat AI Inference Server 3.2 VendorRed Hat Affected — Fixed in 1782951051 Patch available CNA
- Red Hat AI Inference Server 3.2 VendorRed Hat Affected — Fixed in 1782951012 Patch available CNA
- Red Hat AI Inference Server 3.2 VendorRed Hat Affected — Fixed in 1782951244 Patch available CNA
- Red Hat Discovery 2 VendorRed Hat Affected — Fixed in 1782159791 Patch available CNA
- Red Hat Discovery 2 VendorRed Hat Affected — Fixed in 1782166952 Patch available CNA
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in 3.8.13-1.hum1 Patch available CNA
- Red Hat OpenShift AI 3.4 VendorRed Hat Affected — Fixed in 1790703542 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1781525684 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1781525671 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1781525693 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1781525739 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1787241211 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1787135742 Patch available CNA
- Red Hat Update Infrastructure 5 VendorRed Hat Affected — Fixed in 1787241260 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 43
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.2 | 10.2 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux_eus:10.0 | 10.0 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::appstream | 8 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:8::baseos | 8 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus_long_life:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/o:redhat:rhel_aus:8.4::baseos | 8.4 | — | Red Hat |
| cpe:/o:redhat:rhel_eus_long_life:8.4::baseos | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.6::appstream | 8.6 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
- cpe:/o:redhat:enterprise_linux_eus:10.0 Versions 10.0 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus_long_life:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/o:redhat:rhel_aus:8.4::baseos Versions 8.4 — ·Red Hat
- cpe:/o:redhat:rhel_eus_long_life:8.4::baseos Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.6::appstream Versions 8.6 — ·Red Hat
Show 33 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:rhel_eus_long_life:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/o:redhat:rhel_aus:8.6::baseos | 8.6 | — | Red Hat |
| cpe:/o:redhat:rhel_eus_long_life:8.6::baseos | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:8.8::appstream | 8.8 | — | Red Hat |
| cpe:/a:redhat:rhel_tus:8.8::appstream | 8.8 | — | Red Hat |
| cpe:/o:redhat:rhel_e4s:8.8::baseos | 8.8 | — | Red Hat |
| cpe:/o:redhat:rhel_tus:8.8::baseos | 8.8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:9::baseos | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/o:redhat:rhel_e4s:9.2::baseos | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.4::appstream | 9.4 | — | Red Hat |
| cpe:/o:redhat:rhel_e4s:9.4::baseos | 9.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::appstream | 9.6 | — | Red Hat |
| cpe:/o:redhat:rhel_eus:9.6::baseos | 9.6 | — | Red Hat |
| cpe:/a:redhat:openshift:4.12::el8 | 4.12 | — | Red Hat |
| cpe:/a:redhat:openshift:4.13::el9 | 4.13 | — | Red Hat |
| cpe:/a:redhat:openshift:4.14::el9 | 4.14 | — | Red Hat |
| cpe:/a:redhat:openshift:4.15::el9 | 4.15 | — | Red Hat |
| cpe:/a:redhat:openshift:4.16::el9 | 4.16 | — | Red Hat |
| cpe:/a:redhat:openshift:4.17::el9 | 4.17 | — | Red Hat |
| cpe:/a:redhat:openshift:4.18::el9 | 4.18 | — | Red Hat |
| cpe:/a:redhat:openshift:4.19::el9 | 4.19 | — | Red Hat |
| cpe:/a:redhat:cert_manager:1.17::el9 | 1.17 | — | Red Hat |
| cpe:/a:redhat:cert_manager:1.18::el9 | 1.18 | — | Red Hat |
| cpe:/a:redhat:cert_manager:1.20::el9 | 1.20 | — | Red Hat |
| cpe:/a:redhat:ai_inference_server:3.2::el9 | 3.2 | — | Red Hat |
| cpe:/a:redhat:discovery:2::el9 | 2 | — | Red Hat |
| cpe:/a:redhat:hummingbird:1 | 1 | — | Red Hat |
| cpe:/a:redhat:openshift_ai:3.4::el9 | 3.4 | — | Red Hat |
| cpe:/a:redhat:rhui:5::el9 | 5 | — | Red Hat |
| cpe:/o:redhat:rhel_els:6 | 6 | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
- cpe:/a:redhat:rhel_eus_long_life:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/o:redhat:rhel_aus:8.6::baseos Versions 8.6 — ·Red Hat
- cpe:/o:redhat:rhel_eus_long_life:8.6::baseos Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:8.8::appstream Versions 8.8 — ·Red Hat
- cpe:/a:redhat:rhel_tus:8.8::appstream Versions 8.8 — ·Red Hat
- cpe:/o:redhat:rhel_e4s:8.8::baseos Versions 8.8 — ·Red Hat
- cpe:/o:redhat:rhel_tus:8.8::baseos Versions 8.8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:9::baseos Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/o:redhat:rhel_e4s:9.2::baseos Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.4::appstream Versions 9.4 — ·Red Hat
- cpe:/o:redhat:rhel_e4s:9.4::baseos Versions 9.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::appstream Versions 9.6 — ·Red Hat
- cpe:/o:redhat:rhel_eus:9.6::baseos Versions 9.6 — ·Red Hat
- cpe:/a:redhat:openshift:4.12::el8 Versions 4.12 — ·Red Hat
- cpe:/a:redhat:openshift:4.13::el9 Versions 4.13 — ·Red Hat
- cpe:/a:redhat:openshift:4.14::el9 Versions 4.14 — ·Red Hat
- cpe:/a:redhat:openshift:4.15::el9 Versions 4.15 — ·Red Hat
- cpe:/a:redhat:openshift:4.16::el9 Versions 4.16 — ·Red Hat
- cpe:/a:redhat:openshift:4.17::el9 Versions 4.17 — ·Red Hat
- cpe:/a:redhat:openshift:4.18::el9 Versions 4.18 — ·Red Hat
- cpe:/a:redhat:openshift:4.19::el9 Versions 4.19 — ·Red Hat
- cpe:/a:redhat:cert_manager:1.17::el9 Versions 1.17 — ·Red Hat
- cpe:/a:redhat:cert_manager:1.18::el9 Versions 1.18 — ·Red Hat
- cpe:/a:redhat:cert_manager:1.20::el9 Versions 1.20 — ·Red Hat
- cpe:/a:redhat:ai_inference_server:3.2::el9 Versions 3.2 — ·Red Hat
- cpe:/a:redhat:discovery:2::el9 Versions 2 — ·Red Hat
- cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat
- cpe:/a:redhat:openshift_ai:3.4::el9 Versions 3.4 — ·Red Hat
- cpe:/a:redhat:rhui:5::el9 Versions 5 — ·Red Hat
- cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
Remediation
Red Hat 35 advisories
- RHSA-2026:82888 Released 2026-10-14 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.17.2
- Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-bundle
- RHSA-2026:82857 Released 2026-10-14 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-bundle
- RHSA-2026:82372 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
Show 32 more Red Hat advisories
- RHSA-2026:82354 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
- RHSA-2026:82347 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
- RHSA-2026:82322 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.17.2
- Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
- RHSA-2026:82304 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.17.2
- Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
- RHSA-2026:74674 Released 2026-10-01 · Red Hat rating ImportantRed Hat AI Base Images 3.4.3 (Neuron)
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-neuron-rhel9
- RHSA-2026:72502 Released 2026-09-28 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.20.1
- Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-trust-manager-rhel9
- RHSA-2026:65839 Released 2026-09-17 · Red Hat rating ImportantOpenShift Container Platform 4.13.71 bug fix and security update
- Red Hat OpenShift Container Platform 4.13 rhcos-x86_64-413.92.202609080414-0
- RHSA-2026:59831 Released 2026-09-03 · Red Hat rating ImportantOpenShift Container Platform 4.12.97 bug fix and security update
- Red Hat OpenShift Container Platform 4.12 rhcos-x86_64-412.86.202608241157-0
- RHSA-2026:60019 Released 2026-09-03 · Red Hat rating ImportantOpenShift Container Platform 4.17.57 bug fix and security update
- Red Hat OpenShift Container Platform 4.17 rhcos-aarch64-417.94.202608250221-0, rhcos-ppc64le-417.94.202608250221-0, rhcos-s390x-417.94.202608250221-0 +1
- RHSA-2026:56853 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.16.69 bug fix and security update
- Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202608150307-0, rhcos-ppc64le-416.94.202608150307-0, rhcos-s390x-416.94.202608150307-0 +1
- RHSA-2026:56786 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.14.72 bug fix and security update
- Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202608172040-0, rhcos-ppc64le-414.92.202608172040-0, rhcos-s390x-414.92.202608172040-0 +1
- RHSA-2026:56911 Released 2026-08-31 · Red Hat rating ImportantOpenShift Container Platform 4.15.68 bug fix and security update
- Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202608180329-0, rhcos-ppc64le-415.92.202608180329-0, rhcos-s390x-415.92.202608180329-0 +1
- RHSA-2026:57402 Released 2026-08-26 · Red Hat rating ImportantOpenShift Container Platform 4.19.44 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202608182320-0, rhcos-ppc64le-4.19.9.6.202608182320-0, rhcos-s390x-4.19.9.6.202608182320-0 +1
- RHSA-2026:57483 Released 2026-08-26 · Red Hat rating ImportantOpenShift Container Platform 4.18.54 bug fix and security update
- Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202608142238-0, rhcos-ppc64le-418.94.202608142238-0, rhcos-s390x-418.94.202608142238-0 +1
- RHSA-2026:58981 Released 2026-08-24 · Red Hat rating CriticalRed Hat Update Infrastructure 5.3 Technology Preview security update
- Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9, registry.redhat.io/rhui5/installer-tp-rhel9, registry.redhat.io/rhui5/rhua-tp-rhel9
- RHSA-2026:41921 Released 2026-07-20 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) gnutls-c++-3.7.6-21.el9_2.7, gnutls-dane-3.7.6-21.el9_2.7, gnutls-devel-3.7.6-21.el9_2.7 +1
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) gnutls-3.7.6-21.el9_2.7
- RHSA-2026:36006 Released 2026-07-06 · Red Hat rating ImportantRed Hat AI Inference Server 3.2.2 (ROCm)
- Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/vllm-rocm-rhel9
- RHSA-2026:36005 Released 2026-07-06 · Red Hat rating ImportantRed Hat AI Inference Server 3.2.2 (CUDA)
- Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/vllm-cuda-rhel9
- RHSA-2026:36004 Released 2026-07-06 · Red Hat rating ImportantRed Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)
- Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/model-opt-cuda-rhel9
- RHSA-2026:34372 Released 2026-07-01 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux Server (v. 7 ELS) gnutls-3.3.29-9.el7_9.1, gnutls-3.3.29-9.el7_9.1.ppc, gnutls-c++-3.3.29-9.el7_9.1 +6
- RHSA-2026:33125 Released 2026-06-29 · Red Hat rating Importantgnutls and libtasn1 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) gnutls-c++-3.6.14-10.el8_4.1, gnutls-dane-3.6.14-10.el8_4.1, gnutls-devel-3.6.14-10.el8_4.1 +3
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) gnutls-c++-3.6.14-10.el8_4.1, gnutls-dane-3.6.14-10.el8_4.1, gnutls-devel-3.6.14-10.el8_4.1 +3
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) gnutls-3.6.14-10.el8_4.1, libtasn1-4.13-3.el8_4.1
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) gnutls-3.6.14-10.el8_4.1, libtasn1-4.13-3.el8_4.1
- RHSA-2026:32962 Released 2026-06-29 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream E4S (v.9.4) gnutls-c++-3.8.3-4.el9_4.6, gnutls-dane-3.8.3-4.el9_4.6, gnutls-devel-3.8.3-4.el9_4.6 +1
- Red Hat Enterprise Linux BaseOS E4S (v.9.4) gnutls-3.8.3-4.el9_4.6
- RHSA-2026:30849 Released 2026-06-29 · Red Hat rating Importantgnutls and libtasn1 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) gnutls-c++-3.6.16-5.el8_6.5, gnutls-dane-3.6.16-5.el8_6.5, gnutls-devel-3.6.16-5.el8_6.5 +3
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) gnutls-c++-3.6.16-5.el8_6.5, gnutls-dane-3.6.16-5.el8_6.5, gnutls-devel-3.6.16-5.el8_6.5 +3
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) gnutls-3.6.16-5.el8_6.5, libtasn1-4.13-3.el8_6.2
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) gnutls-3.6.16-5.el8_6.5, libtasn1-4.13-3.el8_6.2
- RHSA-2026:30850 Released 2026-06-29 · Red Hat rating Importantgnutls and libtasn1 security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) gnutls-c++-3.6.16-7.el8_8.4, gnutls-dane-3.6.16-7.el8_8.4, gnutls-devel-3.6.16-7.el8_8.4 +3
- Red Hat Enterprise Linux AppStream TUS (v.8.8) gnutls-c++-3.6.16-7.el8_8.4, gnutls-dane-3.6.16-7.el8_8.4, gnutls-devel-3.6.16-7.el8_8.4 +3
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) gnutls-3.6.16-7.el8_8.4, libtasn1-4.13-4.el8_8.1
- Red Hat Enterprise Linux BaseOS TUS (v.8.8) gnutls-3.6.16-7.el8_8.4, libtasn1-4.13-4.el8_8.1
- RHSA-2026:30004 Released 2026-06-25 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) gnutls-c++-3.8.3-6.el9_6.4, gnutls-dane-3.8.3-6.el9_6.4, gnutls-devel-3.8.3-6.el9_6.4 +1
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) gnutls-3.8.3-6.el9_6.4
- RHSA-2026:29197 Released 2026-06-24 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2026:26409 Released 2026-06-16 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) gnutls-c++-3.8.9-9.el10_0.19, gnutls-dane-3.8.9-9.el10_0.19, gnutls-devel-3.8.9-9.el10_0.19 +2
- Red Hat Enterprise Linux BaseOS EUS (v. 10.0) gnutls-3.8.9-9.el10_0.19
- RHSA-2026:26319 Released 2026-06-16 · Red Hat rating ImportantRed Hat Update Infrastructure 5.2 security update
- Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
- RHSA-2026:20612 Released 2026-05-26 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream (v. 9) gnutls-c++-3.8.10-4.el9_8, gnutls-dane-3.8.10-4.el9_8, gnutls-devel-3.8.10-4.el9_8 +1
- Red Hat Enterprise Linux BaseOS (v. 9) gnutls-3.8.10-4.el9_8
- RHSA-2026:20613 Released 2026-05-26 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream (v. 10) gnutls-c++-3.8.10-4.el10_2, gnutls-dane-3.8.10-4.el10_2, gnutls-devel-3.8.10-4.el10_2 +2
- Red Hat Enterprise Linux BaseOS (v. 10) gnutls-3.8.10-4.el10_2
- RHSA-2026:20611 Released 2026-05-26 · Red Hat rating Importantgnutls security update
- Red Hat Enterprise Linux AppStream (v. 8) gnutls-c++-3.6.16-8.el8_10.6, gnutls-dane-3.6.16-8.el8_10.6, gnutls-devel-3.6.16-8.el8_10.6 +1
- Red Hat Enterprise Linux BaseOS (v. 8) gnutls-3.6.16-8.el8_10.6
- RHSA-2026:13274 Released 2026-05-02 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images gnutls-3.8.13-1.hum1@aarch64, gnutls-3.8.13-1.hum1@src, gnutls-3.8.13-1.hum1@x86_64 +14
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Red Hat Cert Manager support for Red Hat OpenShift release 1.17, Cert Manager support for Red Hat OpenShift release 1.18 and 30 more products — RHSA-2026:57402
3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM
Other records, highest priority first
- TI-2026-03321 Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparisonPriority HIGH 72
- TI-2026-26211 Gnutls: gnutls: denial of service via dtls zero-length fragmentPriority MEDIUM 49
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 4 | Affected | — |
| Cert Manager support for Red Hat OpenShift release 1.17 | Fixed | RHSA-2026:82304, RHSA-2026:82322, RHSA-2026:82888 |
| Cert Manager support for Red Hat OpenShift release 1.18 | Fixed | RHSA-2026:82347, RHSA-2026:82354, RHSA-2026:82372, RHSA-2026:82857 |
| Cert Manager support for Red Hat OpenShift release 1.20 | Fixed | RHSA-2026:72502 |
| Red Hat AI Inference Server 3.2 | Fixed | RHSA-2026:36004, RHSA-2026:36005, RHSA-2026:36006 |
| Red Hat Discovery 2 | Fixed | RHSA-2026:29197 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:20613 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:20611 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:20612 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2026:33125 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2026:30849 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2026:30850 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:41921 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:32962 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:26409 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:30004 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:33125 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:30849 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2026:30850 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:20613 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:20611 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:20612 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2026:33125 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2026:30849 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2026:30850 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2026:41921 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.4) | Fixed | RHSA-2026:32962 |
| Red Hat Enterprise Linux BaseOS EUS (v. 10.0) | Fixed | RHSA-2026:26409 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.6) | Fixed | RHSA-2026:30004 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:33125 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:30849 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.8) | Fixed | RHSA-2026:30850 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2026:34372 |
| Red Hat Hardened Images | Fixed | RHSA-2026:13274 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:74674 |
| Red Hat OpenShift Container Platform 4.12 | Fixed | RHSA-2026:59831 |
| Red Hat OpenShift Container Platform 4.13 | Fixed | RHSA-2026:65839 |
| Red Hat OpenShift Container Platform 4.14 | Fixed | RHSA-2026:56786 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | RHSA-2026:56911 |
| Red Hat OpenShift Container Platform 4.16 | Fixed | RHSA-2026:56853 |
| Red Hat OpenShift Container Platform 4.17 | Fixed | RHSA-2026:60019 |
| Red Hat OpenShift Container Platform 4.18 | Fixed | RHSA-2026:57483 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:57402 |
| Red Hat Update Infrastructure 5 | Fixed | RHSA-2026:26319, RHSA-2026:58981 |
Not affected: 19 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux AppStream AUS (v.8.4)
- Red Hat Enterprise Linux AppStream AUS (v.8.6)
- Red Hat Enterprise Linux AppStream E4S (v.8.8)
- Red Hat Enterprise Linux AppStream EUS (v. 10.0)
- Red Hat Enterprise Linux AppStream EUS (v.9.6)
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
- Red Hat Enterprise Linux AppStream TUS (v.8.8)
- Red Hat Enterprise Linux BaseOS AUS (v.8.4)
- Red Hat Enterprise Linux BaseOS AUS (v.8.6)
- Red Hat Enterprise Linux BaseOS E4S (v.8.8)
- Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
- Red Hat Enterprise Linux BaseOS EUS (v.9.6)
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)
- Red Hat Enterprise Linux BaseOS TUS (v.8.8)
- Red Hat Enterprise Linux Server (v. 7 ELS)
- Red Hat Update Infrastructure 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33846
- 2026-10-03 Alias added: GHSA-qcj7-gqxf-2cqq
- 2026-10-08 Fix available: openshift/[email protected], openshift/[email protected], openshift/[email protected] +5 · CNA
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82304 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82322 · Red Hat
- 2026-10-14 Fix available: cert-manager/cert-manager-istio-csr-rhel9@1791459759, cert-manager/cert-manager-operator-rhel9@1789029076, cert-manager/cert-manager-operator-rhel9@1791788287 +4 · CNA
- 2026-10-14 5 new references · CNA
- 2026-10-14 Fix available: RHSA-2026:82372 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82354 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82347 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82857 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82888 · Red Hat
- 2026-10-15 Fix available: cert-manager/cert-manager-operator-bundle@1791966259, cert-manager/cert-manager-operator-bundle@1791970484 · CNA
- 2026-10-15 2 new references · CNA
- 2026-10-16 Fix available: Cert Manager support for Red Hat OpenShift release 1.17, Cert Manager support for Red Hat OpenShift release 1.18 · Red Hat
References
Advisory 35
- RHSA-2026:13274
- RHSA-2026:20611
- RHSA-2026:20612
- RHSA-2026:20613
- RHSA-2026:26319
- RHSA-2026:26409
- RHSA-2026:29197
- RHSA-2026:30004
- RHSA-2026:30849
- RHSA-2026:30850
- RHSA-2026:32962
- RHSA-2026:33125
- RHSA-2026:34372
- RHSA-2026:36004
- RHSA-2026:36005
- RHSA-2026:36006
- RHSA-2026:41921
- RHSA-2026:56786
- RHSA-2026:56853
- RHSA-2026:56911
- RHSA-2026:57402
- RHSA-2026:57483
- RHSA-2026:58981
- RHSA-2026:59831
- RHSA-2026:60019
- RHSA-2026:65839
- RHSA-2026:72502
- RHSA-2026:74674
- RHSA-2026:82304
- RHSA-2026:82322
- RHSA-2026:82347
- RHSA-2026:82354
- RHSA-2026:82372
- RHSA-2026:82857
- RHSA-2026:82888
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Sources
- CVE-2026-33846 · CVE Program
- CVE-2026-33846 · NVD
- FIRST EPSS
- GHSA-qcj7-gqxf-2cqq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33846 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences