CVE-2026-33165

| EUVD-2026-13812 MEDIUM
2026-03-20 GitHub_M
5.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
EUVD ID Assigned
Mar 20, 2026 - 21:00 euvd
EUVD-2026-13812
Analysis Generated
Mar 20, 2026 - 21:00 vuln.today
CVE Published
Mar 20, 2026 - 20:32 nvd
MEDIUM 5.5

Tags

Memory Corruption Buffer Overflow

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.

Analysis

A remote code execution vulnerability in libde265 (CVSS 5.5). Remediation should follow standard vulnerability management procedures.

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: 0

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CVE-2026-33165 vulnerability details – vuln.today
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