JLSEC-2026-648 High 7.2

JLSEC-2026-648

JLSEC Published: Jun 26, 2026
Modified: Jul 17, 2026
Severity: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected Packages: FFMPEG_jll < 8.0.0+0
FFplay_jll < 8.1.2+0
Upstream: CVE-2025-9951 EUVD-2025-27255

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.

References

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