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Vulnerability · Published Jul 10, 2025 · Assigned by redhat

CVE-2025-32989Gnutls: vulnerability in gnutls sct extension parsing

Medium 5.3

In plain English

A medium-severity improper certificate validation in libgnutls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.5%top 26.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10gnutls3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:9gnutls3.8.3-6.el9_6.2ALSA-2025:16116
AlmaLinux:10gnutls-c++3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:9gnutls-c++3.8.3-6.el9_6.2ALSA-2025:16116
AlmaLinux:10gnutls-dane3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:9gnutls-dane3.8.3-6.el9_6.2ALSA-2025:16116
AlmaLinux:10gnutls-devel3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:9gnutls-devel3.8.3-6.el9_6.2ALSA-2025:16116
AlmaLinux:10gnutls-fips3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:10gnutls-utils3.8.9-9.el10_0.14ALSA-2025:16115
AlmaLinux:9gnutls-utils3.8.3-6.el9_6.2ALSA-2025:16116
Alpine:v3.20gnutls3.8.12-r0ALPINE-CVE-2025-32989
Alpine:v3.21gnutls3.8.12-r0ALPINE-CVE-2025-32989
Alpine:v3.22gnutls3.8.12-r0ALPINE-CVE-2025-32989
Alpine:v3.23gnutls3.8.11-r0ALPINE-CVE-2025-32989
Alpine:v3.24gnutls3.8.11-r0ALPINE-CVE-2025-32989
Debian:12gnutls283.7.9-2+deb12u5DSA-5962-1
Debian:12gnutls283.7.9-2+deb12u5DEBIAN-CVE-2025-32989
Debian:13gnutls283.8.9-3DEBIAN-CVE-2025-32989
Debian:14gnutls283.8.9-3DEBIAN-CVE-2025-32989
Rocky Linux:10gnutls0:3.8.9-9.el10_0.14RLSA-2025:16115
Rocky Linux:9gnutls0:3.8.3-6.el9_6.2RLSA-2025:16116
Ubuntu:22.04:LTSgnutls283.7.3-4ubuntu1.7USN-7635-1
Ubuntu:22.04:LTSgnutls283.7.3-4ubuntu1.7UBUNTU-CVE-2025-32989
Ubuntu:24.04:LTSgnutls283.8.3-1.1ubuntu3.4UBUNTU-CVE-2025-32989
Ubuntu:24.04:LTSgnutls283.8.3-1.1ubuntu3.4USN-7635-1
Ubuntu:25.10gnutls283.8.9-3ubuntu1UBUNTU-CVE-2025-32989

Affected products (as reported)

VendorProductVersions
libgnutls 0 – before 3.8.10
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support see references
Red Hat Red Hat Ceph Storage 7 see references
Red Hat Red Hat Discovery 2 see references
Red Hat Red Hat Hardened Images see references
Red Hat Red Hat Insights proxy 1.5 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References