CVE-2025-7700

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

Published: Nov 7, 2025Updated: May 6, 2026 Sources: CVE List NVD BDUCWE-476

5.3MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:LAvailability

Low

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Weaknesses

CWE-476

Affected Products

ООО «РусБИТех-Астра»

commercial·RUaka rusbitech-astra

Astra Linux Special EditionOn-premOS

Operating Systems / linux-distro

FFmpeg team

oss-projectaka ffmpeg

FFmpeg

OSS Libraries

and 1 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2025-7700?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Impact

Initial Access

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References

https://access.redhat.com/security/cve/CVE-2025-7700

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2380420

bugzilla.redhat.com

https://github.com/FFmpeg/FFmpeg/commit/35a6de137a39f274d5e01ed0e0e6c4f04d0aaf07

github.com

and 4 more references View all →

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