CVE-2026-40962

low-risk
Published 2026-04-16

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

Do I need to act?

-
0.01% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.9/10 Medium
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Ffmpeg

References (1)

Issue Tracking https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22348
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal