| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5962-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| gnutls28 (PTS) | bullseye | 3.7.1-5+deb11u5 | fixed |
| bullseye (security) | 3.7.1-5+deb11u8 | fixed |
| bookworm, bookworm (security) | 3.7.9-2+deb12u5 | fixed |
| forky, trixie | 3.8.9-3 | fixed |
| sid | 3.8.10-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - gnutls28 <not-affected> (Vulnerable code introduced later)
https://lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html
https://gitlab.com/gnutls/gnutls/-/issues/1695
Introduced by: https://gitlab.com/gnutls/gnutls/-/commit/242abb6945cbb56c4a41c393d0253ea5b9d3a36a (3.7.3)
Fixed by: https://gitlab.com/gnutls/gnutls/-/commit/8e5ca951257202089246fa37e93a99d210ee5ca2 (3.8.10)