CVE-2026-3081

A flaw was found in GStreamer. A remote attacker can exploit this vulnerability by providing specially crafted H.266 codec data during the parsing of decoding units. This issue arises from insufficient validation of the length of user-supplied data before it is copied to a fixed-length stack-based buffer. Successful exploitation can lead to a stack-based buffer overflow, allowing for arbitrary code execution in the context of the current process.

This is an IMPORTANT vulnerability affecting the GStreamer H.266 codec parser. The flaw allows remote attackers to execute arbitrary code by providing specially crafted H.266 media content. Exploitation requires user interaction with applications that process untrusted H.266 streams using GStreamer.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.