CVE-2025-32988

NameCVE-2025-32988
DescriptionA flaw was found in GnuTLS. A double-free vulnerability exists in GnuTLS due to incorrect ownership handling in the export logic of Subject Alternative Name (SAN) entries containing an otherName. If the type-id OID is invalid or malformed, GnuTLS will call asn1_delete_structure() on an ASN.1 node it does not own, leading to a double-free condition when the parent function or caller later attempts to free the same structure. This vulnerability can be triggered using only public GnuTLS APIs and may result in denial of service or memory corruption, depending on allocator behavior.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4267-1, DSA-5962-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gnutls28 (PTS)bullseye3.7.1-5+deb11u5vulnerable
bullseye (security)3.7.1-5+deb11u8fixed
bookworm, bookworm (security)3.7.9-2+deb12u5fixed
forky, trixie3.8.9-3fixed
sid3.8.10-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gnutls28sourcebullseye3.7.1-5+deb11u8DLA-4267-1
gnutls28sourcebookworm3.7.9-2+deb12u5DSA-5962-1
gnutls28source(unstable)3.8.9-3

Notes

https://lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html
https://gitlab.com/gnutls/gnutls/-/issues/1694
Fixed by: https://gitlab.com/gnutls/gnutls/-/commit/608829769cbc247679ffe98841109fc73875e573 (3.8.10)

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