CVE-2026-54240

libde265: Pixel accessor signed integer overflow causes heap OOB read/write

Published Sep 11, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4789-1 libde265 security update
Debian DSA Debian DSA DSA-6413-1 libde265 security update
Ubuntu USN Ubuntu USN USN-8573-1 libde265 vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Struktur
Struktur libde265
Vendors & Products Struktur
Struktur libde265
Type Values Removed Values Added
Description libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.
Title libde265: Pixel accessor signed integer overflow causes heap OOB read/write
Weaknesses CWE-190
CWE-787
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 14, 2026, 6:37 PM
Reserved
Jun 12, 2026, 4:25 PM
Status
Deferred
Published
Sep 11, 2026, 10:16 PM
Modified
Sep 30, 2026, 7:57 PM