Vulnerability · Published Apr 16, 2026 · Assigned by mitre
CVE-2026-40962
Medium 4.9
In plain English
A medium-severity integer overflow in FFmpeg from FFmpeg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.1%top 97.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ffmpeg | 7:5.1.9-0+deb12u1 | DEBIAN-CVE-2026-40962 |
| Debian:13 | ffmpeg | 7:7.1.4-0+deb13u1 | DEBIAN-CVE-2026-40962 |
| Debian:14 | ffmpeg | 7:8.1-1 | DEBIAN-CVE-2026-40962 |
| Ubuntu:25.10 | ffmpeg | no fix listed | UBUNTU-CVE-2026-40962 |
| Ubuntu:26.10 | ffmpeg | no fix listed | UBUNTU-CVE-2026-40962 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L