Heap-memory write in FFMPEG

published 2022-09-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-34819

cvss: 9.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

A heap out-of-bounds memory write exists in FFMPEG since version 5.1. The size calculation in `build_open_gop_key_points()` goes through all entries in the loop and adds `sc->ctts_data[i].count` to `sc->sample_offsets_count`. This can lead to an integer overflow resulting in a small allocation with `av_calloc()`. An attacker can cause remote code execution via a malicious mp4 file. We recommend upgrading past commit c953baa084607dd1d84c3bfcce3cf6a87c3e6e05

Patch / fix

fixed in 1 distros 2 links 1

FFMPEG FFMPEG c953baa084607dd1d84c3bfcce3cf6a87c3e6e05

debian opensuse

ffmpeg Debian 14, Debian 13, Debian 12 7:5.1.1-1

debian advisories DEBIAN-CVE-2022-2566

ffmpeg-5 openSUSE Tumbleweed 5.1.1-1.1

opensuse advisories openSUSE-SU-2024:12332-1

github.com/FFmpeg/FFmpeg@c953baa commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-2566 updated 2025-11-21 cvss 6.2

<media-video/ffmpeg-5.1.1: OOB read

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-04-21)

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

FFMPEG FFMPEG

Classification

Weakness

CWE-122 Heap-based Buffer Overflow
CWE-190 Integer Overflow or Wraparound

References

github.com /FFmpeg/FFmpeg/commit/c953baa084607dd1d84c3bfcce3cf6a87c3e6e05
patch, third-party-advisory

Sources

CVE List CVE-2022-2566
NVD CVE-2022-2566

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary