CVE-2025-7700

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

State: Published
Severity: 5.3 Medium
Published: Nov 7, 2025
Updated: May 6, 2026
Reserved: Jul 16, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	redhat

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
ffmpeg	before 8.0Affected

References

https://access.redhat.com/security/cve/CVE-2025-7700vdb-entry
RHBZ#2380420issue-tracking
https://github.com/FFmpeg/FFmpeg/commit/35a6de137a39f274d5e01ed0e0e6c4f04d0aaf07

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