Vulnerability in Gnu Gnutls

CVE-2025-32989

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 certi…

Vulnerability class: Improper Certificate Validation

EPSS: 0.001 (29.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-32989?
CVE-2025-32989 is a medium-severity vulnerability in Gnu Gnutls, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2025-07-10.
How severe is CVE-2025-32989?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-32989 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.