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 products
gnu: gnutls; redhat: openshift container platform; redhat: enterprise linux
References10
- access.redhat.com/security/cve/CVE-2025-32989 Vendor Advisory
- access.redhat.com/errata/RHSA-2025:16115
- access.redhat.com/errata/RHSA-2025:16116
- access.redhat.com/errata/RHSA-2025:17181
- access.redhat.com/errata/RHSA-2025:17348
- access.redhat.com/errata/RHSA-2025:17361
- access.redhat.com/errata/RHSA-2025:19088
- access.redhat.com/errata/RHSA-2025:22529
- access.redhat.com/errata/RHSA-2026:7477
- bugzilla.redhat.com/show_bug.cgi?id=2359621 Issue Tracking
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 1% percentile: 74 · as of 7 November 2026
- CWE
- CWE-295
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