FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:LI:LA:L4.9/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LOther