What’s Vulnerable › Vulnerabilities

CVE-2021-3497

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-19 · updated 2026-06-17
• Weakness: CWE-416

Description

GStreamer before 1.18.4 might access already-freed memory in error code paths when demuxing certain malformed Matroska files.

Affected products

• Debian Linux: 9.0, 10.0
• GStreamer: from 0.10.0 before 1.18.4 — fixed in 1.18.4
• Red Hat Enterprise Linux: 7.0, 8.0

How to fix

Upgrade to a fixed version: GStreamer 1.18.4. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1945339
• https://gstreamer.freedesktop.org/security/sa-2021-0002.html
• https://lists.debian.org/debian-lts-announce/2021/04/msg00027.html
• https://security.gentoo.org/glsa/202208-31
• https://www.debian.org/security/2021/dsa-4900
• https://bugzilla.redhat.com/show_bug.cgi?id=1945339
• https://gstreamer.freedesktop.org/security/sa-2021-0002.html
• https://lists.debian.org/debian-lts-announce/2021/04/msg00027.html
• https://security.gentoo.org/glsa/202208-31
• https://www.debian.org/security/2021/dsa-4900

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