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High · 7.8 CVE-2026-3086 EUVD-2026-12131

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

Published Mar 13, 2026 · Updated Jul 15, 2026 · Assigned by zdi

Description

GStreamer H.266 Codec Parser Out-Of-Bounds Write Remote Code Execution Vulnerability. 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. Was ZDI-CAN-28911.

Affected products

VendorProductAffectedFixed
GStreamer GStreamer 1c6e163aa33962f5ee4a87d29319ccdd5cb67612 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 gst-plugins-bad1.0 1.28.1-1 —
Debian 13 gst-plugins-bad1.0 1.26.2-3+deb13u1 —
ReleasePackageFixed inAdvisory
Ubuntu 25.10 gst-plugins-bad1.0 No fix yet —
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 24.04 LTS gst-plugins-bad1.0 No fix yet —
Ubuntu Pro 22.04 LTS gst-plugins-bad1.0 No fix yet —
Ubuntu Pro 20.04 LTS gst-plugins-bad1.0 No fix yet —
Ubuntu Pro 18.04 LTS gst-plugins-bad1.0 No fix yet —
Ubuntu Pro 16.04 LTS gst-plugins-bad1.0 No fix yet —
Ubuntu Pro 14.04 LTS gst-plugins-bad1.0 No fix yet —

Advisories 1

References