CVE-2025-32989 MEDIUM

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

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-295
Published July 10, 2025
Last update May 12, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 10, 2025 CVE published
May 12, 2026 Record updated