CVE-2026-33165

5.0 mediumEPSS 0.2%

Medium (5.0) in struktur libde265. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.0 medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2026-03-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

struktur:libde265

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

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