What’s Vulnerable › Vulnerabilities

CVE-2019-17539

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-10-14 · updated 2026-06-17
• Weakness: CWE-476

Description

In FFmpeg before 4.2, avcodec_open2 in libavcodec/utils.c allows a NULL pointer dereference and possibly unspecified other impact when there is no valid close function pointer.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 20.04
• Debian Linux: 9.0, 10.0
• FFmpeg: before 3.4.7; from 4.0 before 4.0.5; from 4.1 before 4.1.5 — fixed in 3.4.7, 4.0.5, 4.1.5

How to fix

Upgrade to a fixed version: FFmpeg 3.4.7, 4.0.5, 4.1.5. Check the vendor advisory for mitigations.

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15733
• https://github.com/FFmpeg/FFmpeg/commit/8df6884832ec413cf032dfaa45c23b1c7876670c
• https://lists.debian.org/debian-lts-announce/2021/01/msg00026.html
• https://security.gentoo.org/glsa/202003-65
• https://usn.ubuntu.com/4431-1/
• https://www.debian.org/security/2020/dsa-4722
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15733
• https://github.com/FFmpeg/FFmpeg/commit/8df6884832ec413cf032dfaa45c23b1c7876670c
• https://lists.debian.org/debian-lts-announce/2021/01/msg00026.html
• https://security.gentoo.org/glsa/202003-65
• https://usn.ubuntu.com/4431-1/
• https://www.debian.org/security/2020/dsa-4722

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