CVE-2026-4775

Name	CVE-2026-4775
Description	A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.
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
tiff (PTS)	bullseye	4.2.0-1+deb11u5	vulnerable
	bullseye (security)	4.2.0-1+deb11u7	vulnerable
	bookworm, bookworm (security)	4.5.0-6+deb12u3	vulnerable
	trixie (security), trixie	4.7.0-3+deb13u1	vulnerable
	forky, sid	4.7.1-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
tiff	source	(unstable)	(unfixed)

https://bugzilla.redhat.com/show_bug.cgi?id=2450768
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