Bug 2447483 (CVE-2026-3084)

Summary: CVE-2026-3084 GStreamer: GStreamer: Remote Code Execution via integer underflow in H.266 Codec Parser
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in GStreamer. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. The issue stems from an integer underflow during the parsing of H.266 video codec picture partitions, caused by insufficient validation of user-supplied data. Successful exploitation can lead to remote code execution in the context of the current process.
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Bug Depends On: 2448011, 2448005, 2448009, 2448013, 2448018    
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Description OSIDB Bzimport 2026-03-13 21:01:48 UTC 
GStreamer H.266 Codec Parser Integer Underflow 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 parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.