Advisory Details

March 6th, 2026

GStreamer H.266 Codec Parser Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-26-170
ZDI-CAN-28911

CVE ID CVE-2026-3086
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS GStreamer
AFFECTED PRODUCTS GStreamer
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the processing of APS units. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS GStreamer has issued an update to correct this vulnerability. More details can be found at:
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/025d59cf3459c2903f0384b6b94bc3235e177b53
DISCLOSURE TIMELINE
  • 2026-02-11 - Vulnerability reported to vendor
  • 2026-03-06 - Coordinated public release of advisory
  • 2026-03-06 - Advisory Updated
CREDIT Anonymous
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