CVE-2026-32739

Name	CVE-2026-32739
Description	libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.
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
libheif (PTS)	bullseye	1.11.0-1	vulnerable
	bullseye (security)	1.11.0-1+deb11u2	vulnerable
	bookworm, bookworm (security)	1.15.1-1+deb12u1	vulnerable
	trixie	1.19.8-1	vulnerable
	forky, sid	1.21.2-4	vulnerable

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

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

Notes

https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c
https://github.com/strukturag/libheif/commit/723b58d6ca329b2743822951aeaf3299c7410448 (v1.22.0)