CVE-2026-49346 | libde265 is an open source implementation of the h.265 video… | CVSS 7.1 HIGH

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.

Metadata

CVE ID: CVE-2026-49346
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-29 14:35 UTC
Published: 2026-06-19 20:12 UTC
Last updated: 2026-06-19 20:12 UTC
Primary CWE: CWE-190
CWE-190: Integer Overflow or Wraparound
Vendor / Product: strukturag / libde265
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Affected products (1)

Vendor	Product	Platform	Versions
strukturag	libde265	—	< 1.1.0

Weakness (CWE)

CWE	Source	Description
CWE-190	cna	CWE-190: Integer Overflow or Wraparound

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

References (2)

https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86
https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8