by Kastro
Paper/Archive/CVE-2026-40962

CVE-2026-40962

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

EPSS 0.1%CVSS 9.8
critical.is priorityof 100
30
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 2.9.029 × 200.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

Affected

ProductAffectedFixed inSource
FFmpeg4.1 – < 8.18.1CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitre (CNA)4.9CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refcode.ffmpeg.org/FFmpeg/FFmpeg/pulls/22348