Integer Underflow Vulnerability in GStreamer H.266 Codec Parser

CVE-2026-3084

What is CVE-2026-3084?

This vulnerability is found in the GStreamer H.266 Codec Parser, where insufficient validation of user-supplied data can cause an integer underflow during picture partition parsing. Exploiting this flaw allows remote attackers to execute arbitrary code within the context of the current process on affected installations. Interaction with the codec library is required, making the nature of the attack dependent on specific implementation circumstances. This issue highlights the importance of robust data validation practices in software development.

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