Name: CVE-2026-40962: Integer Overflow or Wraparound
Creator: Rapid7
Published: 2026-04-16T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-40962, CWE-190, CVSS 4.9, EPSS 0.00158

FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.

CVSS Details

CVSS 3.1 Base Score: 4.9
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade ffmpeg	May 17, 2026	May 17, 2026
Ffmpeg	—	No fixes or workaround suggested by the vendor	Apr 27, 2026	Apr 27, 2026
Ubuntu	—	Upgrade libavcodec-extra62 (Ubuntu Pro)Upgrade libavutil56 (Ubuntu Pro)Upgrade libavresample4 (Ubuntu Pro)Upgrade libavutil60 (Ubuntu Pro)Upgrade libswscale5 (Ubuntu Pro)Upgrade libavfilter-extra (Ubuntu Pro)Upgrade libavformat62 (Ubuntu Pro)Upgrade libavcodec-extra58 (Ubuntu Pro)Upgrade libavcodec62 (Ubuntu Pro)Upgrade libavfilter7 (Ubuntu Pro)Upgrade libavformat-extra60 (Ubuntu Pro)Upgrade libavutil-dev (Ubuntu Pro)Upgrade libavutil58 (Ubuntu Pro)Upgrade libswscale9 (Ubuntu Pro)Upgrade libavdevice62 (Ubuntu Pro)Upgrade libavcodec58 (Ubuntu Pro)Upgrade libpostproc57 (Ubuntu Pro)Upgrade libswscale7 (Ubuntu Pro)Upgrade libavdevice-dev (Ubuntu Pro)Upgrade libpostproc55 (Ubuntu Pro)Upgrade libavdevice58 (Ubuntu Pro)Upgrade libavresample-dev (Ubuntu Pro)Upgrade libswscale-dev (Ubuntu Pro)Upgrade libavformat-extra62 (Ubuntu Pro)Upgrade libswresample3 (Ubuntu Pro)Upgrade libavfilter9 (Ubuntu Pro)Upgrade libavfilter-extra11 (Ubuntu Pro)Upgrade libswresample-dev (Ubuntu Pro)Upgrade libavfilter-extra7 (Ubuntu Pro)Upgrade libswresample4 (Ubuntu Pro)Upgrade libpostproc-dev (Ubuntu Pro)Upgrade libavfilter-extra9 (Ubuntu Pro)Upgrade libswresample6 (Ubuntu Pro)Upgrade libavformat60 (Ubuntu Pro)Upgrade libavfilter-dev (Ubuntu Pro)Upgrade libavformat-dev (Ubuntu Pro)Upgrade libavcodec60 (Ubuntu Pro)Upgrade libavcodec-extra60 (Ubuntu Pro)Upgrade libavcodec-dev (Ubuntu Pro)Upgrade libavformat58 (Ubuntu Pro)Upgrade libavfilter11 (Ubuntu Pro)Upgrade ffmpeg (Ubuntu Pro)Upgrade libavformat-extra (Ubuntu Pro)Upgrade libavformat-extra58 (Ubuntu Pro)Upgrade libavdevice60 (Ubuntu Pro)Upgrade libavcodec-extra (Ubuntu Pro)	Jun 25, 2026	Jun 24, 2026

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CVSS Details

Covered by Rapid7

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