CVE-2026-40962

MEDIUM

FFmpeg < 8.1 - Integer Overflow and Out-of-Bounds Write via CENC Subsample Data

Title source: llm
STIX 2.1

Description

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

References (1)

Core 1

Scores

CVSS v3 4.9
EPSS 0.0013
EPSS Percentile 3.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-190
Status published
Products (2)
ffmpeg/ffmpeg < 8.1
FFmpeg/FFmpeg 4.1 - 8.1
Published Apr 16, 2026
Tracked Since Apr 16, 2026