CVE-2026-49337

Name	CVE-2026-49337
Description	libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches 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)
Debian Bugs	1140431

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+deb11u4	vulnerable
	bookworm	1.0.11-1+deb12u2	vulnerable
	trixie	1.0.15-1	vulnerable
	forky, sid	1.0.18-1	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)			1140431

Notes

https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm
Fixed by: https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9 (v1.1.0)