CVE-2026-33165
5.0
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-33165
To remediate CVE-2026-33165, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.18-r0 or later
- —upgrade to 1.0.11-0+deb11u4 or later
Is CVE-2026-33165 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.0.18-r0
- from 0, < 1.0.11-0+deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.0 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H |