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CVE-2026-33165
5.5 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): LOCAL
- Attack complexity (AC): LOW
- Privileges required (PR): NONE
- User interaction (UI): REQUIRED
- Scope (S): UNCHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): NONE
- Availability impact (A): HIGH
heap out-of-bounds write in libde265 1.0.16
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.
References
- https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg x_refsource_CONFIRM
- https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 x_refsource_MISC
- https://github.com/strukturag/libde265/releases/tag/v1.0.17 x_refsource_MISC
Affected products
libde265
- ==< 1.0.17