CVE-2025-32989 | BDVDB-2026-285698 Detail
Red HatRed Hat Enterprise Linux 10
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.
Impact#
Per CVSS v3.1: confidentiality impact low, integrity impact none, availability impact none. Attack vector: network.
Weaknesses#
- CWE-295 Improper Certificate Validation
References#
- https://access.redhat.com/errata/RHSA-2025:16115
- https://access.redhat.com/errata/RHSA-2025:16116
- https://access.redhat.com/errata/RHSA-2025:17181
- https://access.redhat.com/errata/RHSA-2025:17348
- https://access.redhat.com/errata/RHSA-2025:17361
- https://access.redhat.com/errata/RHSA-2025:19088
- https://access.redhat.com/errata/RHSA-2025:22529
- https://access.redhat.com/errata/RHSA-2026:7477
- https://access.redhat.com/security/cve/CVE-2025-32989
- https://bugzilla.redhat.com/show_bug.cgi?id=2359621
- https://lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html
- http://www.openwall.com/lists/oss-security/2025/07/11/3
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.