CVE-2026-45382

Name	CVE-2026-45382
Description	libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.19, `decoder_context::decode_slice_unit_tiles` (libde265/decctx.cc:920) reads `pps.CtbAddrRStoTS[ctbAddrRS]` at line 966 where `ctbAddrRS = ctbY * ctbsWidth + ctbX` is computed from PPS-supplied `colBd[]`/`rowBd[]` arrays without validating the result against `CtbAddrRStoTS.size() == sps->PicSizeInCtbsY`. A malformed PPS that passes `set_derived_values` but encodes geometry inconsistent with the SPS produces a `ctbAddrRS` past the allocation, causing a 4-byte heap-buffer-overflow READ. Version 1.0.19 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
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	1.1.1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libde265	source	(unstable)	1.1.1-1

Notes

https://github.com/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9
https://github.com/strukturag/libde265/commit/c33b4f63ae9056b00f34a31874fed55cd0aa29c9 (v1.0.19)