CVE-2025-7700

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

Published Nov 7, 2025 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Users are strongly encouraged to apply vendor-supplied updates or patches as they become available to address this vulnerability.

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4440-1 ffmpeg security update
Debian DSA Debian DSA DSA-5985-1 ffmpeg security update
Debian DSA Debian DSA DSA-6007-1 ffmpeg security update
History
Type Values Removed Values Added
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title FFmpeg: NULL Pointer Dereference in FFmpeg ALS Decoder (libavcodec/alsdec.c) Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description No description is available for this CVE.
Title FFmpeg: NULL Pointer Dereference in FFmpeg ALS Decoder (libavcodec/alsdec.c)
Weaknesses CWE-476
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

threat_severity

Moderate

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
May 6, 2026, 2:38 PM
Reserved
Jul 16, 2025, 5:12 AM
Status
Deferred
Published
Nov 7, 2025, 7:16 PM
Modified
Nov 5, 2026, 2:10 PM
Severity
Moderate
Public date
Jul 15, 2025, 12:00 AM