CVE-2020-12284

Name: CVE-2020-12284
Creator: NVD / NIST
Published: 2020-04-28T06:15:10.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.76%

Last modified Jun 17, 2026

CVE-2020-12284 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.76% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.76%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	4.1
Ffmpeg	Ffmpeg	4.2.2
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Debian	Debian Linux	10.0

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19734Exploit, Issue Tracking, Vendor Advisory
https://github.com/FFmpeg/FFmpeg/commit/1812352d767ccf5431aa440123e2e260a4db2726Patch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/a3a3730b5456ca00587455004d40c047f7b20a99Patch, Third Party Advisory
https://security.gentoo.org/glsa/202007-58Third Party Advisory
https://usn.ubuntu.com/4431-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4722Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19734Exploit, Issue Tracking, Vendor Advisory
https://github.com/FFmpeg/FFmpeg/commit/1812352d767ccf5431aa440123e2e260a4db2726Patch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/a3a3730b5456ca00587455004d40c047f7b20a99Patch, Third Party Advisory
https://security.gentoo.org/glsa/202007-58Third Party Advisory
https://usn.ubuntu.com/4431-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4722Third Party Advisory

Timeline

Published: Apr 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12284?

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.

How severe is CVE-2020-12284?

CVE-2020-12284 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.76% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12284?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12284?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST