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.
History

Tue, 24 Mar 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 24 Mar 2026 02:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:struktur:libde265:*:*:*:*:*:*:*:*

Mon, 23 Mar 2026 10:00:00 +0000

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First Time appeared Struktur
Struktur libde265
Vendors & Products Struktur
Struktur libde265

Fri, 20 Mar 2026 21:00:00 +0000

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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.
Title heap out-of-bounds write in libde265 1.0.16
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-24T18:48:34.866Z

Reserved: 2026-03-17T21:17:08.888Z

Link: CVE-2026-33165

cve-icon Vulnrichment

Updated: 2026-03-24T18:48:22.689Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-20T21:17:16.453

Modified: 2026-03-23T20:09:04.893

Link: CVE-2026-33165

cve-icon Redhat

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