CVE-2025-6199

Name	CVE-2025-6199
Description	A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid symbol is encountered during decompression, the decoder sets the reported output size to the full buffer length rather than the actual number of written bytes. This logic error results in uninitialized sections of the buffer being included in the output, potentially leaking arbitrary memory contents in the processed image.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1107994

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gdk-pixbuf (PTS)	bullseye	2.42.2+dfsg-1+deb11u2	vulnerable
	bullseye (security)	2.42.2+dfsg-1+deb11u1	vulnerable
	bookworm	2.42.10+dfsg-1+deb12u1	vulnerable
	sid, trixie	2.42.12+dfsg-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gdk-pixbuf	source	(unstable)	(unfixed)			1107994

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2373147
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/257
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/191
Fixed by: https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/c4986342b241cdc075259565f3fa7a7597d32a32 (2.43.2)