GStreamer RIFF Palette Integer 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 handling of palette data in AVI files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28854.
Conclusion & alert: CVE-2026-2921 is rated Low Risk (34.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
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 | 2026-03-30 | 0.06% | 0.03% | -0.03% |
| 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-2026-2921: 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-2026-2921 |
debian
|
not yet assigned | CVE-2026-2921 not yet assigned priority: Debian including 1 source packages (gst-plugins-base1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-2921 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-2921 |
suse
|
high | CVE-2026-2921 severity important: SUSE including 15 source package names (gstreamer1-plugins-bad-free-1.16.1-6.el8_10, gstreamer1-plugins-bad-free-1.22.12-5.el9_7, …), 15 product×package rows across 2 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9): Fixed 15. | https://www.suse.com/security/cve/CVE-2026-2921/ |
ubuntu
|
medium | CVE-2026-2921 medium priority: Ubuntu including 1 source packages (gst-plugins-base1.0), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): released 4, needs-triage 3. | https://ubuntu.com/security/CVE-2026-2921 |