CVE-2026-33165

libde265-0: libde265 is an open source implementation of the h.265 video codec

CVE-2026-33165 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-33165, released March 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.0
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0025
15th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
libde265 · Debian 12.15 (bookworm) 1.0.11-1+deb12u3 DEBIAN-CVE-2026-33165 Mar 20, 2026
libde265 · Debian 13.5 (trixie) 1.0.15-1+deb13u2 DEBIAN-CVE-2026-33165 Mar 20, 2026
libde265 · Debian 14 1.0.18-1 DEBIAN-CVE-2026-33165 Mar 20, 2026
libde265 · amzn 2023 1.0.18-1.amzn2023.0.1 ALAS2023-2026-1585 Apr 13, 2026
libde265-0 · Ubuntu 18.04.6 LTS (bionic) 1.0.2-2ubuntu0.18.04.1~esm6 libde265-0 1.0.2-2ubuntu0.18.04.1~esm6 Jul 23, 2026
libde265-0 · Ubuntu 20.04 LTS (focal) 1.0.4-1ubuntu0.4+esm2 libde265-0 1.0.4-1ubuntu0.4+esm2 Jul 23, 2026
libde265-0 · Ubuntu 22.04.1 LTS (jammy) 1.0.8-1ubuntu0.3+esm2 libde265-0 1.0.8-1ubuntu0.3+esm2 Jul 23, 2026
libde265-0 · Ubuntu 24.04.5 LTS (noble) 1.0.15-1ubuntu0.1 libde265-0 1.0.15-1ubuntu0.1 Jul 23, 2026
libde265-0 · Ubuntu 26.04.1 LTS (resolute) 1.0.16-1ubuntu0.1~esm1 libde265-0 1.0.16-1ubuntu0.1~esm1 Jun 30, 2026
libde265-debuginfo · amzn 2023 1.0.18-1.amzn2023.0.1 ALAS2023-2026-1585 Apr 13, 2026
libde265-debugsource · amzn 2023 1.0.18-1.amzn2023.0.1 ALAS2023-2026-1585 Apr 13, 2026
libde265-devel · amzn 2023 1.0.18-1.amzn2023.0.1 ALAS2023-2026-1585 Apr 13, 2026
libde265-examples · Ubuntu 18.04.6 LTS (bionic) 1.0.2-2ubuntu0.18.04.1~esm6 libde265-examples 1.0.2-2ubuntu0.18.04.1~esm6 Jul 23, 2026
libde265-examples · Ubuntu 20.04 LTS (focal) 1.0.4-1ubuntu0.4+esm2 libde265-examples 1.0.4-1ubuntu0.4+esm2 Jul 23, 2026
libde265-examples · Ubuntu 22.04.1 LTS (jammy) 1.0.8-1ubuntu0.3+esm2 libde265-examples 1.0.8-1ubuntu0.3+esm2 Jul 23, 2026
libde265-examples · Ubuntu 24.04.5 LTS (noble) 1.0.15-1ubuntu0.1 libde265-examples 1.0.15-1ubuntu0.1 Jul 23, 2026
libde265-examples · Ubuntu 26.04.1 LTS (resolute) 1.0.16-1ubuntu0.1~esm1 libde265-examples 1.0.16-1ubuntu0.1~esm1 Jun 30, 2026

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