Bug 2447493 (CVE-2026-3086)

Summary: CVE-2026-3086 GStreamer: GStreamer: Remote Code Execution via Out-Of-Bounds Write in H.266 Codec Parser
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in GStreamer. A remote attacker could exploit this out-of-bounds write vulnerability by providing specially crafted H.266 video data. This issue, specifically within the processing of Adaptation Parameter Set (APS) units, stems from insufficient validation of user-supplied data, leading to a write beyond the allocated buffer. Successful exploitation allows the attacker to execute arbitrary code on the system where GStreamer is running.
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Bug Depends On: 2448010, 2448032, 2448004, 2448008, 2448037    
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Description OSIDB Bzimport 2026-03-13 21:02:18 UTC 
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.