CVE-2026-33165

MEDIUM

5.5

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.

CVE Details

CVSS v3.1 Score5.5

SeverityMEDIUM

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/20/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

struktur:libde265

Weaknesses (CWE)

CWE-787

References

https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658(security-advisories@github.com)

https://github.com/strukturag/libde265/releases/tag/v1.0.17(security-advisories@github.com)

https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg(security-advisories@github.com)

IOC Correlations

No correlations recorded

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