CVE-2026-2920
GStreamer ASF Demuxer Heap-based Buffer Overflow Remote Code Execution Vulnerability.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.77%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.77% probability · 54th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-120
- Affected
- gstreamer/gstreamer
- Source
- zdi-disclosures@trendmicro.com
References
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/37d7991168a223d0810fd1f4493ec6a8b6a510d3Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-26-164/Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:19024
- https://access.redhat.com/errata/RHSA-2026:19180
- https://access.redhat.com/errata/RHSA-2026:6259
- https://access.redhat.com/errata/RHSA-2026:6300
- https://access.redhat.com/errata/RHSA-2026:6750
- https://access.redhat.com/errata/RHSA-2026:8854
- https://access.redhat.com/errata/RHSA-2026:8862
- https://access.redhat.com/security/cve/CVE-2026-2920
- https://bugzilla.redhat.com/show_bug.cgi?id=2447490
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2920.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.