What is CVE-2025-22921?

CVE-2025-22921 is a medium-severity vulnerability in Ffmpeg, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2025-02-18.

How severe is CVE-2025-22921?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-22921 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Ffmpeg

CVE-2025-22921

FFmpeg git-master,N-113007-g8d24a28d06 was discovered to contain a segmentation violation via the component /libavcodec/jpeg2000dec.c.

Published 2025-02-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Ffmpeg — versions 7.0, 7.0.1, 7.0.2
Debian Linux — versions 11.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

w4zu/Debian_

References

trac.ffmpeg.org/ticket/11393 (Issue Tracking)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List)

Frequently asked questions

What is CVE-2025-22921?: CVE-2025-22921 is a medium-severity vulnerability in Ffmpeg, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2025-02-18.
How severe is CVE-2025-22921?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-22921 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.