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Fencer Vulns
medium 5.3

CVE-2025-10256 json

Ffmpeg: null pointer dereference in firequalizer filter (libavfilter/af_firequalizer.c)

published 2026-02-18 8 mo ago modified 2026-07-25 3 mo ago also EUVD-2025-207798 , JLSEC-2026-641

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

A NULL pointer dereference vulnerability exists in FFmpeg’s Firequalizer filter (libavfilter/af_firequalizer.c) due to a missing check on the return value of av_malloc_array() in the config_input() function. An attacker could exploit this by tricking a victim into processing a crafted media file with the Firequalizer filter enabled, causing the application to dereference a NULL pointer and crash, leading to denial of service.

Patch / fix

  • julia FFMPEG_jll 8.0.0+0
  • julia FFplay_jll 8.1.2+0
  • ffmpeg ffmpeg 8.0
  • ffmpeg Debian 13 7:7.1.2-0+deb13u1
  • ffmpeg Debian 14 7:7.1.2-1

debian advisories DEBIAN-CVE-2025-10256

  • ffmpeg Ubuntu Pro 18.04 LTS 7:3.4.11-0ubuntu0.1+esm11
  • ffmpeg Ubuntu Pro 20.04 LTS 7:4.2.7-0ubuntu0.1+esm11
  • ffmpeg Ubuntu Pro 22.04 LTS 7:4.4.2-0ubuntu0.22.04.1+esm10
  • ffmpeg Ubuntu Pro 24.04 LTS 7:6.1.1-3ubuntu5+esm6

ubuntu advisories UBUNTU-CVE-2025-10256

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 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7, SLE Module for Desktop Applications 15 SP7 3.4.2-150200.11.70.1
  • 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-2026:3149-1SUSE-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-2025-10256 updated cvss 5.3

ffmpeg: NULL pointer dereference in Firequalizer filter (libavfilter/af_firequalizer.c)

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present “No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.”

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
none
Automatable
yes
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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

Classification

Weakness

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.