What’s Vulnerable › Vulnerabilities

CVE-2020-12284

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-28 · updated 2026-06-17
• Weakness: CWE-787

Description

cbs_jpeg_split_fragment in libavcodec/cbs_jpeg.c in FFmpeg 4.1 and 4.2.2 has a heap-based buffer overflow during JPEG_MARKER_SOS handling because of a missing length check.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 20.04
• Debian Linux: 10.0
• FFmpeg: 4.1, 4.2.2

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19734
• https://github.com/FFmpeg/FFmpeg/commit/1812352d767ccf5431aa440123e2e260a4db2726
• https://github.com/FFmpeg/FFmpeg/commit/a3a3730b5456ca00587455004d40c047f7b20a99
• https://security.gentoo.org/glsa/202007-58
• https://usn.ubuntu.com/4431-1/
• https://www.debian.org/security/2020/dsa-4722
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19734
• https://github.com/FFmpeg/FFmpeg/commit/1812352d767ccf5431aa440123e2e260a4db2726
• https://github.com/FFmpeg/FFmpeg/commit/a3a3730b5456ca00587455004d40c047f7b20a99
• https://security.gentoo.org/glsa/202007-58
• https://usn.ubuntu.com/4431-1/
• https://www.debian.org/security/2020/dsa-4722

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