CVE-2025-9951 HIGH

CVE-2025-9951: Remote code execution via Heap Buffer Overflow in FFmpeg JPEG2000

Vendor Ffmpeg
Product FFmpeg
Weakness CWE-122
Published September 9, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

7.2/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 9, 2025 CVE published
February 26, 2026 Record updated