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.
Conclusion & alert: CVE-2026-2920 is rated Moderate Risk (48.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.69%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.69% | +0.63% |
| 2 | 2026-03-14 | — | 0.06% | — |
Full EPSS history (2 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 3.0 | HIGH |
|
1.8 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-2920: 1 source package rows (gstreamer); 29 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 0, open 29. | https://security.alpinelinux.org/vuln/CVE-2026-2920 |
debian
|
not yet assigned | CVE-2026-2920 not yet assigned priority: Debian including 1 source packages (gst-plugins-ugly1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-2920 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-2920 |
suse
|
high | CVE-2026-2920 severity important: SUSE including 46 source package names (13.2-9.23:libsystemd0-254.27-1.1, 13.2-9.23:libudev1-254.27-1.1, …), 103 product×package rows across 27 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (27 product lines)): Fixed 101, First Fixed 2. | https://www.suse.com/security/cve/CVE-2026-2920/ |
ubuntu
|
medium | CVE-2026-2920 medium priority: Ubuntu including 1 source packages (gst-plugins-ugly1.0), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 6, released 1. | https://ubuntu.com/security/CVE-2026-2920 |
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/37d7991168a223d0810fd1f4493ec6a8b6a510d3 | Patch Vendor Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-26-164/ | Third Party Advisory |