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CVE-2025-7700— Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)

Quick assessment

Affected
CVE-2025-7700
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FFmpeg是FFmpeg团队的一套可录制、转换以及流化音视频的完整解决方案。 FFmpeg存在安全漏洞，该漏洞源于攻击者可强制取消引用空指针，可能导致拒绝服务。

CVSS 5.3 · Medium EPSS 0.38% · P29

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None < 8.0 affected

I. Basic Information for CVE-2025-7700

Vulnerability Information
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Vulnerability Title
Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
FFmpeg 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FFmpeg是FFmpeg团队的一套可录制、转换以及流化音视频的完整解决方案。 FFmpeg存在安全漏洞，该漏洞源于攻击者可强制取消引用空指针，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 8.0 -

II. Public POCs for CVE-2025-7700

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2025-7700

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Patches & Fixes for CVE-2025-7700 (1)

IV. Related Vulnerabilities

Same weakness: CWE-476

V. Comments for CVE-2025-7700

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