CVE-2025-32989

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.

Reserved 2025-04-15 | Published 2025-07-10 | Updated 2025-07-10 | Assigner redhat

Problem types

Improper Certificate Validation

Product status

Default status
affected

Default status
unknown

Default status
unknown

Default status
affected

Default status
affected

Default status
affected

Timeline

2025-04-15:	Reported to Red Hat.
2025-07-10:	Made public.

References

access.redhat.com/security/cve/CVE-2025-32989 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2359621 (RHBZ#2359621) issue-tracking

cve.org (CVE-2025-32989)

nvd.nist.gov (CVE-2025-32989)

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