CVE-2026-49346

libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow

Published Jun 19, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.

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
First Time appeared Struktur
Struktur libde265
Vendors & Products Struktur
Struktur libde265
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.
Title libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow
Weaknesses CWE-190
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 22, 2026, 2:05 PM
Reserved
May 29, 2026, 2:35 PM
Status
Analyzed
Published
Jun 19, 2026, 9:17 PM
Modified
Oct 25, 2026, 11:10 PM