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.
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 1.0.20, 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.
Title libde265 has an unbounded memory leak via orphaned slice headers in `read_slice_NAL`
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-19T19:53:18.817Z

Updated: 2026-06-22T14:00:14.667Z

Reserved: 2026-05-29T14:35:45.902Z

Link: CVE-2026-49337

cve-icon Vulnrichment

Updated: 2026-06-22T14:00:05.818Z

cve-icon NVD

No data.

cve-icon Redhat

No data.