CVE-2026-49337

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-06-19 21:17

Updated : 2026-06-23 15:44

NVD link : CVE-2026-49337

Mitre link : CVE-2026-49337

CVE.ORG link : CVE-2026-49337

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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