CVE-2025-32989

MEDIUM

Gnutls - Improper Certificate Validation

Title source: rule

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.

References (10)

[Vendor Advisory] https://access.redhat.com/security/cve/CVE-2025-32989

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=2359621

[Mailing List] http://www.openwall.com/lists/oss-security/2025/07/11/3

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:16115

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:16116

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:17181

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:17348

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:17361

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:19088

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2025:22529

Scores

CVSS v3 5.3

EPSS 0.0009

EPSS Percentile 26.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Classification

CWE

CWE-295

Status published

Affected Products (7)

gnu/gnutls

redhat/openshift_container_platform

redhat/enterprise_linux

redhat/enterprise_linux

redhat/enterprise_linux

redhat/enterprise_linux

redhat/enterprise_linux

Timeline

Published Jul 10, 2025

Tracked Since Feb 18, 2026