CVE-2026-33165

EUVD-2026-13812
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
Affected Products (NVD)
VendorProductVersion
strukturlibde265
𝑥
< 1.0.17
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libde265
bookworm
vulnerable
bullseye
vulnerable
bullseye (security)
1.0.11-0+deb11u4
fixed
forky
1.0.18-1
fixed
sid
1.0.18-1
fixed
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libde265
bionic
needed
focal
needed
jammy
needed
noble
needed
questing
needed
resolute
needed
xenial
ignored
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libde265
Amazon Linux 2023
0:1.0.18-1.amzn2023.0.1
fixed
libde265-debuginfo
Amazon Linux 2023
0:1.0.18-1.amzn2023.0.1
fixed
libde265-debugsource
Amazon Linux 2023
0:1.0.18-1.amzn2023.0.1
fixed
libde265-devel
Amazon Linux 2023
0:1.0.18-1.amzn2023.0.1
fixed
Common Weakness Enumeration
References
https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658
https://github.com/strukturag/libde265/releases/tag/v1.0.17
https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg