Gnutls: vulnerability in gnutls sct extension parsing
Priority LOW 27CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Partial Red Hat: 12 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-295.
Summary
A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01467 73rd percentileScored 2026-11-07
Fix Partial libgnutls: 3.8.10Red Hat: 8 advisoriesRed Hat: 12 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 |
|---|---|---|---|---|---|
| — | libgnutls | before 3.8.10 | 3.8.10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | 3.8.9-9.el10_0.14 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.3-6.el9_6.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 3.8.3-6.el9_6.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 3.7.6-21.el9_2.4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 3.8.3-4.el9_4.4 | Patch available | CNA |
| Red Hat | Red Hat Ceph Storage 7 | — | 7 | Patch available | CNA |
| Red Hat | Red Hat Discovery 2 | — | 2.3.0-1760554384 | Patch available | CNA |
| Red Hat | Red Hat Hardened Images | — | 3.8.12-1.1.hum1 | Patch available | CNA |
| Red Hat | Red Hat Insights proxy 1.5 | — | 1.5.7-1759331989 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
- libgnutls Vendor— Affected before 3.8.10 Fixed in 3.8.10 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 3.8.9-9.el10_0.14 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.3-6.el9_6.2 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 3.8.3-6.el9_6.2 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 3.7.6-21.el9_2.4 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 3.8.3-4.el9_4.4 Patch available CNA
- Red Hat Ceph Storage 7 VendorRed Hat Affected — Fixed in 7 Patch available CNA
- Red Hat Discovery 2 VendorRed Hat Affected — Fixed in 2.3.0-1760554384 Patch available CNA
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in 3.8.12-1.1.hum1 Patch available CNA
- Red Hat Insights proxy 1.5 VendorRed Hat Affected — Fixed in 1.5.7-1759331989 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | GNU |
| 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: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 libgnutls Fixed in 3.8.10
Red Hat 8 advisories
- RHSA-2026:7477 Released 2026-04-10 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images gnutls-3.8.12-1.1.hum1@aarch64, gnutls-3.8.12-1.1.hum1@src, gnutls-3.8.12-1.1.hum1@x86_64 +14
- RHSA-2025:22529 Released 2025-12-01 · Red Hat rating ImportantRed Hat Ceph Storage
- Red Hat Ceph Storage 7 registry.redhat.io/rhceph/rhceph-7-rhel9
- RHSA-2025:19088 Released 2025-10-23 · Red Hat rating ModerateA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-ui-rhel9
Show 5 more Red Hat advisories
- RHSA-2025:17361 Released 2025-10-06 · Red Hat rating Moderategnutls security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) gnutls-c++-3.7.6-21.el9_2.4, gnutls-dane-3.7.6-21.el9_2.4, gnutls-devel-3.7.6-21.el9_2.4 +1
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) gnutls-3.7.6-21.el9_2.4
- RHSA-2025:17348 Released 2025-10-06 · Red Hat rating Moderategnutls security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) gnutls-c++-3.8.3-4.el9_4.4, gnutls-dane-3.8.3-4.el9_4.4, gnutls-utils-3.8.3-4.el9_4.4
- Red Hat Enterprise Linux BaseOS EUS (v.9.4) gnutls-3.8.3-4.el9_4.4
- RHSA-2025:17181 Released 2025-10-01 · Red Hat rating ImportantInsights proxy Container Image
- Red Hat Insights proxy 1.5 registry.redhat.io/insights-proxy/insights-proxy-container-rhel9
- RHSA-2025:16116 Released 2025-09-17 · Red Hat rating Moderategnutls security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) gnutls-c++-3.8.3-6.el9_6.2, gnutls-dane-3.8.3-6.el9_6.2, gnutls-devel-3.8.3-6.el9_6.2 +1
- Red Hat Enterprise Linux BaseOS (v. 9) gnutls-3.8.3-6.el9_6.2
- RHSA-2025:16115 Released 2025-09-17 · Red Hat rating Moderategnutls security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 10) gnutls-c++-3.8.9-9.el10_0.14, gnutls-dane-3.8.9-9.el10_0.14, gnutls-devel-3.8.9-9.el10_0.14 +2
- Red Hat Enterprise Linux BaseOS (v. 10) gnutls-3.8.9-9.el10_0.14
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Red Hat Ceph Storage 7, Red Hat Discovery 2 and 10 more products — RHSA-2025:16115
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2025-24000 Gnutls: vulnerability in gnutls certtool template parsingPriority MEDIUM 43
- TI-2025-23998 Gnutls: vulnerability in gnutls othername san exportPriority LOW 39
- TI-2025-05796 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()Priority LOW 30
- Advisory ·
Red Hat Ceph Storage 7, Red Hat Discovery 2 and 10 more products — RHSA-2025:16116
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2025-24000 Gnutls: vulnerability in gnutls certtool template parsingPriority MEDIUM 43
- TI-2025-23998 Gnutls: vulnerability in gnutls othername san exportPriority LOW 39
- TI-2025-05796 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()Priority LOW 30
Show 3 more groups
- Advisory ·
Red Hat Ceph Storage 7, Red Hat Discovery 2 and 10 more products — RHSA-2025:17348
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2025-24000 Gnutls: vulnerability in gnutls certtool template parsingPriority MEDIUM 43
- TI-2025-23998 Gnutls: vulnerability in gnutls othername san exportPriority LOW 39
- TI-2025-05796 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()Priority LOW 30
- Advisory ·
Red Hat Ceph Storage 7, Red Hat Discovery 2 and 10 more products — RHSA-2025:19088
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2025-24000 Gnutls: vulnerability in gnutls certtool template parsingPriority MEDIUM 43
- TI-2025-23998 Gnutls: vulnerability in gnutls othername san exportPriority LOW 39
- TI-2025-05796 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()Priority LOW 30
- Advisory ·
Red Hat Ceph Storage 7, Red Hat Discovery 2 and 10 more products — RHSA-2025:22529
4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2025-24000 Gnutls: vulnerability in gnutls certtool template parsingPriority MEDIUM 43
- TI-2025-23998 Gnutls: vulnerability in gnutls othername san exportPriority LOW 39
- TI-2025-05796 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()Priority LOW 30
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 7 | Fixed | RHSA-2025:22529 |
| Red Hat Discovery 2 | Fixed | RHSA-2025:19088 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2025:16115 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:16116 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:17361 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:17348 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2025:16115 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2025:16116 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2025:17361 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.4) | Fixed | RHSA-2025:17348 |
| Red Hat Hardened Images | Fixed | RHSA-2026:7477 |
| Red Hat Insights proxy 1.5 | Fixed | RHSA-2025:17181 |
Not affected: 4 products
- Red Hat Ceph Storage 7
- Red Hat Discovery 2
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux AppStream EUS (v.9.4)
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32989
- 2026-10-03 Alias added: GHSA-f7q5-qg45-7vm8
References
More Red Hat Enterprise Linux vulnerabilities
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- 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-2025-32989 · CVE Program
- CVE-2025-32989 · NVD
- FIRST EPSS
- GHSA-f7q5-qg45-7vm8 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-32989 · 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