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Fencer Vulns
medium 5.3

CVE-2025-7700 json

Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)

published 2025-11-07 12 mo ago modified 2026-11-05 3 d ago also EUVD-2025-38295

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or system control, it can be used to disrupt services and cause a denial of service.

Patch / fix

  • 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-2025-7700

  • ffmpeg Ubuntu 25.10 7:7.1.1-1ubuntu4.1
  • ffmpeg Ubuntu Pro 24.04 LTS 7:6.1.1-3ubuntu5+esm6

ubuntu advisories UBUNTU-CVE-2025-7700

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-7 SLES for SAP applications 16.0, SLES 16.0 7.1.2-160000.1.1
  • ffmpeg SLE Workstation Extension 15 SP7, SLE Workstation Extension 15 SP6, SLE Module for Package Hub 15 SP7 +16 more 3.4.2-150200.11.67.1
  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Workstation Extension 15 SP6, SLE Module for Package Hub 15 SP7 +2 more 4.4.6-150600.13.33.1
  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Workstation Extension 15 SP6, SLE Module for Package Hub 15 SP7 +2 more 4.4.6-150600.13.30.1
  • ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.6-150400.3.52.1

suse advisories SUSE-SU-2026:20932-1SUSE-SU-2025:2990-1SUSE-SU-2025:3715-1SUSE-SU-2025:03162-1SUSE-SU-2025:02990-1SUSE-SU-2025:02972-1

  • ffmpeg-7 openSUSE Leap 16.0 7.1.2-160000.1.1
  • ffmpeg-4 openSUSE Tumbleweed 4.4.6-5.1
  • ffmpeg-7 openSUSE Tumbleweed 7.1.1-8.1

opensuse advisories openSUSE-SU-2026:20420-1openSUSE-SU-2025:15427-1openSUSE-SU-2025:15396-1

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-2025-7700 updated cvss 5.3

FFmpeg: NULL Pointer Dereference in FFmpeg ALS Decoder (libavcodec/alsdec.c)

  • 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
none
Automatable
yes
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% 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

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.