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Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2025-32989] vulnerability in gnutls sct extension parsing

This medium-severity Red Hat Linux advisory covers CVE-2025-32989 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2025-32989 Source published Source updated

VulniPulse record published

CVE-2025-32989
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Weakness: CWE-295.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Extended Update Support; Red Hat Ceph Storage 7; Red Hat Discovery 2; Red Hat Hardened Images; Red Hat Insights proxy 1.5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4.

Red Hat lists Red Hat Enterprise Linux 8 as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Red Hat fixing advisory: RHSA-2025:16115, RHSA-2025:16116, RHSA-2025:17361, RHSA-2025:17348, RHSA-2025:22529, RHSA-2025:19088, RHSA-2026:7477, RHSA-2025:17181.

Affected products named by the advisory: Red Hat package: gnutls.

Is CVE-2025-32989 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2025-32989 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2025-32989?

Upgrade to a fixed release named by Red Hat:

  • gnutls-0:3.8.9-9.el10_0.14
  • gnutls-0:3.8.3-6.el9_6.2
  • gnutls-0:3.7.6-21.el9_2.4
  • gnutls-0:3.8.3-4.el9_4.4
  • rhceph/rhceph-7-rhel9:7
  • discovery/discovery-ui-rhel9:2.3.0-1760554384
  • gnutls-main-3.8.12-1.1.hum1
  • insights-proxy/insights-proxy-container-rhel9:1.5.7-1759331989
  • RHSA-2025:16115
  • RHSA-2025:16116
  • RHSA-2025:17361
  • RHSA-2025:17348

4 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

Fixed versions
  • gnutls-0:3.8.9-9.el10_0.14
  • gnutls-0:3.8.3-6.el9_6.2
  • gnutls-0:3.7.6-21.el9_2.4
  • gnutls-0:3.8.3-4.el9_4.4
  • rhceph/rhceph-7-rhel9:7
  • discovery/discovery-ui-rhel9:2.3.0-1760554384
  • gnutls-main-3.8.12-1.1.hum1
  • insights-proxy/insights-proxy-container-rhel9:1.5.7-1759331989
  • RHSA-2025:16115
  • RHSA-2025:16116
  • RHSA-2025:17361
  • RHSA-2025:17348
  • RHSA-2025:22529
  • RHSA-2025:19088
  • RHSA-2026:7477
  • RHSA-2025:17181

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Currently, no mitigation is available for this vulnerability.

Official advisory · high-confidence parse· fetched 18 days ago·verify at source

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