Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison
Priority HIGH 72CWE-178Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Partial Red Hat: 42 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00565 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial gnutls: 3.8.13Red Hat: 32 advisoriesRed Hat: 42 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| — | gnutls | before 3.8.13 | 3.8.13 | Patch available | CNA |
| 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_9.2 | 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 | — | 414.92.202609011250-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | 415.92.202609140326-0 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | 416.94.202609011112-0 | 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 | — | 418.94.202609031320-0 | 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 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 |
- gnutls Vendor— Affected before 3.8.13 Fixed in 3.8.13 Patch available 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_9.2 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 414.92.202609011250-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.15 VendorRed Hat Affected — Fixed in 415.92.202609140326-0 Patch available CNA
- Red Hat OpenShift Container Platform 4.16 VendorRed Hat Affected — Fixed in 416.94.202609011112-0 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 418.94.202609031320-0 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 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 configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | GNU |
| cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Red Hat |
- cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·GNU
- cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
- cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat
Remediation
- Fix · CNA gnutls Fixed in 3.8.13
Red Hat 32 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 29 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-2026:67857 Released 2026-09-28 · Red Hat rating ImportantOpenShift Container Platform 4.15.69 bug fix and security update
- Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202609140326-0, rhcos-ppc64le-415.92.202609140326-0, rhcos-s390x-415.92.202609140326-0 +1
- 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-2026:65851 Released 2026-09-17 · Red Hat rating ImportantOpenShift Container Platform 4.18.55 bug fix and security update
- Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202609031320-0, rhcos-ppc64le-418.94.202609031320-0, rhcos-s390x-418.94.202609031320-0 +1
- RHSA-2026:62409 Released 2026-09-14 · Red Hat rating ImportantOpenShift Container Platform 4.14.73 bug fix and security update
- Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202609011250-0, rhcos-ppc64le-414.92.202609011250-0, rhcos-s390x-414.92.202609011250-0 +1
- RHSA-2026:62549 Released 2026-09-10 · Red Hat rating ImportantOpenShift Container Platform 4.16.70 bug fix and security update
- Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202609011112-0, rhcos-ppc64le-416.94.202609011112-0, rhcos-s390x-416.94.202609011112-0 +1
- 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-2026:57402 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-2026:58981 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-2026:43575 Released 2026-07-22 · Red Hat rating Moderategnutls security update
- Red Hat Enterprise Linux Server (v. 7 ELS) gnutls-3.3.29-9.el7_9.2, gnutls-3.3.29-9.el7_9.2.ppc, gnutls-c++-3.3.29-9.el7_9.2 +6
- 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-2026:33125 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 29 more products — RHSA-2026:57402
3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM
Other records, highest priority first
- TI-2026-26211 Gnutls: gnutls: denial of service via dtls zero-length fragmentPriority MEDIUM 49
- TI-2026-26212 Gnutls: gnutls: denial of service via heap buffer overflow in dtls handshake fragment reassemblyPriority MEDIUM 41
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 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-2026:43575 |
| 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-2026:62409 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | RHSA-2026:67857 |
| Red Hat OpenShift Container Platform 4.16 | Fixed | RHSA-2026:62549 |
| Red Hat OpenShift Container Platform 4.17 | Fixed | RHSA-2026:60019 |
| Red Hat OpenShift Container Platform 4.18 | Fixed | RHSA-2026:65851 |
| 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-2026-3833
- 2026-10-03 Alias added: GHSA-6rgh-57xm-37v8
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-09 Fix available: openshift/[email protected], openshift/[email protected], openshift/[email protected] +5 · CNA
- 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
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Advisory 34
- 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-2026:41921
- RHSA-2026:43575
- RHSA-2026:57402
- RHSA-2026:58981
- RHSA-2026:59831
- RHSA-2026:60019
- RHSA-2026:62409
- RHSA-2026:62549
- RHSA-2026:65839
- RHSA-2026:65851
- RHSA-2026:67857
- 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
- https://access.redhat.com/security/cve/CVE-2026-3833
- RHBZ#2445763
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- TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
Sources
- CVE-2026-3833 · CVE Program
- CVE-2026-3833 · NVD
- FIRST EPSS
- GHSA-6rgh-57xm-37v8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-3833 · 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