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CVE-2025-8585— libav DSS File Demuxer avconv.c main double free

Quick assessment

Affected
n/a libav
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.

Libav是Libav团队的一套跨平台的可对音频和视频进行录制、转换的解决方案，它包含了一个libavcodec编码器。 libav 12.3及之前版本存在资源管理错误漏洞，该漏洞源于组件DSS File Demuxer中文件/avtools/avconv.c的函数main存在双重释放。

CVSS 5.3 · Medium EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2025-8585

Vulnerability Information
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Vulnerability Title
libav DSS File Demuxer avconv.c main double free
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, has been found in libav up to 12.3. Affected by this issue is the function main of the file /avtools/avconv.c of the component DSS File Demuxer. The manipulation leads to double free. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The bug was initially reported by the researcher to the wrong project. This vulnerability only affects products that are no longer supported by the maintainer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
libav 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Libav是Libav团队的一套跨平台的可对音频和视频进行录制、转换的解决方案，它包含了一个libavcodec编码器。 libav 12.3及之前版本存在资源管理错误漏洞，该漏洞源于组件DSS File Demuxer中文件/avtools/avconv.c的函数main存在双重释放。
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
- libav 12.0 -

II. Public POCs for CVE-2025-8585

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III. Intelligence Information for CVE-2025-8585

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Vendor Advisories for CVE-2025-8585 (1)

Same Patch Batch · n/a · 2025-08-05 · 22 CVEs total

CVE-2025-8584 3.3 LOW libav AVI File Parser buffer.c av_buffer_unref null pointer dereference
CVE-2025-8586 3.3 LOW libav MPEG File Parser utils.c ff_seek_frame_binary null pointer dereference
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Showing top 20 of 22 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: libav
Same vendor: n/a
Same weakness: CWE-415

V. Comments for CVE-2025-8585

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