CVE-2026-2920GStreamer ASF Demuxer Heap-based Buffer Overflow Remote Code Execution Vulnerability

Official description

GStreamer ASF Demuxer Heap-based Buffer Overflow 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 processing of stream headers within ASF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28843.

Affected packages & fixed versions

Affected products (as reported)

References

• ZDI-26-164 x_research-advisory
• vendor-provided URL vendor-advisory
• https://access.redhat.com/security/cve/CVE-2026-2920 vdb-entry, x_refsource_REDHAT
• RHBZ#2447490 issue-tracking, x_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2920.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:8854 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:6259 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:19024 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:6750 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:8862 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:6300 vendor-advisory, x_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:19180 vendor-advisory, x_refsource_REDHAT