CVE-2025-9951

A heap-buffer-overflow write exists in jpeg2000dec FFmpeg which allows an attacker to potentially gain remote code execution or cause denial of service via the channel definition cdef atom of JPEG2000.

CVSS 4.0

7.2CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)

CWE

CWE-122

Published

2025-09-09

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

References

• https://github.com/google/security-research/security/advisories/GHSA-39q3-f8jq-v6mg

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