CVE-2026-2920

A flaw was found in GStreamer. This heap-based buffer overflow vulnerability in the ASF Demuxer component allows a remote attacker to execute arbitrary code. The issue arises from insufficient validation of user-supplied data length when processing stream headers within ASF (Advanced Systems Format) files, leading to data being copied to a fixed-length heap-based buffer without proper bounds checking. Successful exploitation can result in arbitrary code execution in the context of the current process.

This is an IMPORTANT heap-based buffer overflow vulnerability in the GStreamer ASF Demuxer. The flaw allows remote code execution when processing specially crafted ASF files due to improper validation of stream header lengths. Red Hat products utilizing GStreamer for multimedia processing are affected if they handle untrusted ASF content.

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.

Avoid processing untrusted ASF (Advanced Systems Format) media files. This vulnerability in the GStreamer ASF Demuxer requires user interaction, such as opening a malicious ASF file, to trigger the heap-based buffer overflow. Limiting exposure to untrusted media content can reduce the attack surface.