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Fencer Vulns
high 7.2

CVE-2025-9951 json

Remote code execution via Heap Buffer Overflow in FFmpeg JPEG2000

published 2025-09-09 13 mo ago modified 2026-10-19 20 d ago also EUVD-2025-27255 , JLSEC-2026-648

cvss
7.2
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia FFMPEG_jll 8.0.0+0
  • julia FFplay_jll 8.1.2+0
  • ffmpeg ffmpeg 7.1.2
  • ffmpeg Debian 12 7:5.1.7-0+deb12u1
  • ffmpeg Debian 13 7:7.1.2-0+deb13u1
  • ffmpeg Debian 14 7:7.1.2-1

debian advisories DEBIAN-CVE-2025-9951

  • ffmpeg Ubuntu Pro 24.04 LTS 7:6.1.1-3ubuntu5+esm6

ubuntu advisories UBUNTU-CVE-2025-9951

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 4.4.7-150600.13.47.1
  • ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.7-150400.3.67.1

suse advisories SUSE-SU-2026:2445-1SUSE-SU-2026:2444-1

  • ffmpeg-9 openSUSE Tumbleweed 9.0.1-1.1
  • ffmpeg-7 openSUSE Leap 16.0 7.1.4-160000.1.1
  • ffmpeg-8 openSUSE Tumbleweed 8.1.1-3.1
  • ffmpeg-4 openSUSE Tumbleweed 4.4.7-2.1
  • ffmpeg-7 openSUSE Tumbleweed 7.1.4-2.1

opensuse advisories openSUSE-SU-2026:11515-1openSUSE-SU-2026:21211-1openSUSE-SU-2026:10890-1openSUSE-SU-2026:10866-1openSUSE-SU-2026:10867-1

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-2025-9951 updated cvss 7.1

FFmpeg: heap-based buffer overflow in jpeg2000dec

  • 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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
13 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.2 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
CNA 4.0 7.2 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

ecosystem package affected fixed in
julia FFMPEG_jll
<8.0.0+0
8.0.0+0
julia FFplay_jll
<8.1.2+0
8.1.2+0

Affected products

  • FFmpeg FFmpeg

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.