Security Advisory

CVE-2026-49337

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-19 19:53:18

Last updated 2026-06-22 14:00:14

Assigner GitHub_M

CVSS score 4.3

State PUBLISHED

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.

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