GStreamer H265 Codec Parsing Stack-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 parsing of H265 slice headers. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26596.
Conclusion & alert: CVE-2025-3887 is rated High Risk (68/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.91%). Core evidence: EPSS rose +1.35% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2026-06-10 | 3.56% | 4.91% | +1.35% |
| 2 | 2026-06-09 | 2.67% | 3.56% | +0.89% |
| 3 | 2026-06-03 | — | 2.67% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.0 | HIGH |
|
2.8 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-3887: 2 source package rows (gst-plugins-bad, gstreamer); 16 state rows across 7 repos (3.19-main, 3.20-main, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 2, open 14. | https://security.alpinelinux.org/vuln/CVE-2025-3887 |
debian
|
not yet assigned | CVE-2025-3887 not yet assigned priority: Debian including 1 source packages (gst-plugins-bad1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-3887 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-3887 |
suse
|
high | CVE-2025-3887 severity important: SUSE including 260 source package names (gstreamer-plugins-bad-1.16.3-150200.4.25.1, gstreamer-plugins-bad-1.16.3-150300.9.21.1, …), 612 product×package rows across 29 product lines (SUSE Enterprise Storage 7.1, SUSE Liberty Linux 8, … (29 product lines)): Fixed 612. | https://www.suse.com/security/cve/CVE-2025-3887/ |
ubuntu
|
high | CVE-2025-3887 high priority: Ubuntu including 1 source packages (gst-plugins-bad1.0), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): released 6, needed 2, not-affected 2. | https://ubuntu.com/security/CVE-2025-3887 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| gstreamer | gstreamer | >= 1.0.0, < 1.26.1 | cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-25-267/ | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2025/06/msg00017.html | Mailing List Third Party Advisory |