CVE-2026-33165

Name	CVE-2026-33165
Description	libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17.
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)
Debian Bugs	1131468

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libde265 (PTS)	bullseye	1.0.11-0+deb11u3	vulnerable
	bullseye (security)	1.0.11-0+deb11u1	vulnerable
	bookworm	1.0.11-1+deb12u2	vulnerable
	trixie	1.0.15-1	vulnerable
	forky, sid	1.0.16-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libde265	source	(unstable)	(unfixed)			1131468

Notes

https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg
Fixed by: https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 (v1.0.17)