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.
History

Wed, 24 Jun 2026 20:45:00 +0000

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

Mon, 22 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 19 Jun 2026 20:30:00 +0000

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-19T20:12:14.958Z

Updated: 2026-06-22T14:05:14.851Z

Reserved: 2026-05-29T14:35:45.903Z

Link: CVE-2026-49346

cve-icon Vulnrichment

Updated: 2026-06-22T14:03:45.009Z

cve-icon NVD

No data.

cve-icon Redhat

No data.