What’s Vulnerable › Vulnerabilities

CVE-2021-3185

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-26 · updated 2026-06-17
• Weakness: CWE-120

Description

A flaw was found in the gstreamer h264 component of gst-plugins-bad before v1.18.1 where when parsing a h264 header, an attacker could cause the stack to be smashed, memory corruption and possibly code execution.

Affected products

• Freedesktop Gst-Plugins-Bad: before 1.18.1 — fixed in 1.18.1

How to fix

Upgrade to a fixed version: Freedesktop Gst-Plugins-Bad 1.18.1. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1917192
• https://security.gentoo.org/glsa/202208-31
• https://bugzilla.redhat.com/show_bug.cgi?id=1917192
• https://security.gentoo.org/glsa/202208-31

Get alerted when CVE-2021-3185 or the next vulnerability affects your stack