CVE-2025-32988

Name	CVE-2025-32988
Description	A 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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4267-1, 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	vulnerable
	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.

Package	Type	Release	Fixed Version	Origin
gnutls28	source	bullseye	3.7.1-5+deb11u8	DLA-4267-1
gnutls28	source	bookworm	3.7.9-2+deb12u5	DSA-5962-1
gnutls28	source	(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)