CVE-2026-49337 | libde265 is an open source implementation of the h.265 video… | CVSS 4.3 MEDIUM

Description

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches the issue.

Metadata

CVE ID: CVE-2026-49337
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-29 14:35 UTC
Published: 2026-06-19 19:53 UTC
Last updated: 2026-06-19 20:10 UTC
Primary CWE: CWE-770
CWE-770: Allocation of Resources Without Limits or Throttlin…
Vendor / Product: strukturag / libde265
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
strukturag	libde265	—	< 1.0.20

Weakness (CWE)

CWE	Source	Description
CWE-770	cna	CWE-770: Allocation of Resources Without Limits or Throttling

CVSS scores (1)

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

References (2)

https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm
https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9 https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9