CVE-2026-96611

Name	CVE-2026-96611
Description	FFmpeg before 9.0 has a signed integer overflow in libavformat/mov.c. In mov_read_ispe(), uint32_t width/height values from a crafted HEIF ispe box are stored into signed int fields without bounds checking, allowing values exceeding INT_MAX to become negative. In read_image_grid(), accumulating these values causes signed integer overflow (undefined behavior per C17 section 6.5), which on x86 wraps to a small positive value, bypassing downstream validity checks.
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)
References	DSA-6361-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ffmpeg (PTS)	bookworm, bookworm (security)	7:5.1.9-0+deb12u1	vulnerable
	trixie (security), trixie	7:7.1.5-0+deb13u1	fixed
	forky	7:8.1.2-2	fixed
	sid	7:9.0.2-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ffmpeg	source	trixie	7:7.1.5-0+deb13u1		DSA-6361-1
ffmpeg	source	(unstable)	7:8.1.2-1

Notes

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23455
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2cc7b87bdb75bcb59bf8bcd5296ca43f89b3a909 (n9.0)
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/31a192f5dd75be9f7520db29ce44fa8f36ae8ba3 (n8.1.2)
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/15396fa8d550cd19e8619cca919ea09ecbe84ef6 (n7.1.5)