CVE-2026-47254

Name	CVE-2026-47254
Description	libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, `Track::init_sample_timing_table()` in `libheif/sequences/track.cc` stores an out-of-bounds chunk index (`m_chunks.size()`) into `m_presentation_timeline` when the number of chunks defined in the `stco` box is less than the number of samples in `stsz`. A subsequent call to `heif_track_get_next_raw_sequence_sample()` reads `m_chunks[chunk_idx]` with that OOB index, causing a heap-buffer-overflow. Version 1.22.0 fixes the issue.
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	fixed
	trixie (security)	1.19.8-1+deb13u1	fixed
	forky, sid	1.23.1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libheif	source	trixie	(not affected)
libheif	source	(unstable)	1.23.1-1

Notes

[trixie] - libheif <not-affected> (Vulnerable code introduced in 1.20.0)
https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg