CVE-2026-2921

A flaw was found in GStreamer. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. The flaw exists within the handling of palette data in AVI files, where a lack of proper validation of user-supplied data can lead to an integer overflow before writing to memory. An attacker can leverage this integer overflow to execute code in the context of the current process.

This is an IMPORTANT vulnerability in GStreamer that allows arbitrary code execution. The flaw occurs due to an integer overflow when processing palette data in specially crafted AVI files. Exploitation requires a user to process a malicious AVI file with an application linked against the GStreamer library.

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.

To mitigate this issue, avoid processing untrusted AVI media files with applications that use the GStreamer library. Users should exercise caution when opening or playing AVI files from unknown or suspicious sources.