CVE-2026-1485

Name	CVE-2026-1485
Description	A flaw was found in Glib's content type parsing logic. This buffer underflow vulnerability occurs because the length of a header line is stored in a signed integer, which can lead to integer wraparound for very large inputs. This results in pointer underflow and out-of-bounds memory access. Exploitation requires a local user to install or process a specially crafted treemagic file, which can lead to local denial of service or application instability.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
glib2.0 (PTS)	bullseye	2.66.8-1+deb11u4	vulnerable
	bullseye (security)	2.66.8-1+deb11u7	vulnerable
	bookworm	2.74.6-2+deb12u8	vulnerable
	bookworm (security)	2.74.6-2+deb12u2	vulnerable
	trixie	2.84.4-3~deb13u2	vulnerable
	forky, sid	2.86.3-4	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
glib2.0	source	(unstable)	(unfixed)

Notes

https://gitlab.gnome.org/GNOME/glib/-/issues/3871
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4980
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4981