CVE-2025-32989
Gnutls: vulnerability in gnutls sct extension parsing
CVSS Score
5.3
EPSS Score
0.1%
EPSS Percentile
34th
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.
| CWE | CWE-295 |
| Published | Jul 10, 2025 |
| Last Updated | Apr 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support
All versions affected Red Hat / Red Hat Ceph Storage 7
All versions affected Red Hat / Red Hat Discovery 2
All versions affected Red Hat / Red Hat Insights proxy 1.5
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Hardened Images
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2025:16115 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:16116 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:17181 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:17348 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:17361 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:19088 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:22529 access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-32989 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2359621 lists.gnupg.org: https://lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html openwall.com: http://www.openwall.com/lists/oss-security/2025/07/11/3