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CVE-2022-2652— Use of Externally-Controlled Format String in umlaeute/v4l2loopback

Quick assessment

Affected
umlaeute umlaeute/v4l2loopback
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.

v4l2loopback是umläute个人开发者的一个创建 V4L2 环回设备的内核模块。 v4l2loopback存在格式化字符串错误漏洞，该漏洞源于根据卡标签中的格式化字符串的方式，有可能泄露内核栈内存，还有可能由于内核模块在按要求提供卡片标签时崩溃而造成DoS（例如，在一排有许多%s修饰的情况下出现）。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.33% · P27
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I. Basic Information for CVE-2022-2652

Vulnerability Information
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Vulnerability Title
Use of Externally-Controlled Format String in umlaeute/v4l2loopback
Source: CVE Program / CVE List V5
Vulnerability Description
Depending on the way the format strings in the card label are crafted it's possible to leak kernel stack memory. There is also the possibility for DoS due to the v4l2loopback kernel module crashing when providing the card label on request (reproduce e.g. with many %s modifiers in a row).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部控制的格式字符串
Source: CVE Program / CVE List V5
Vulnerability Title
v4l2loopback 格式化字符串错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
v4l2loopback是umläute个人开发者的一个创建 V4L2 环回设备的内核模块。 v4l2loopback存在格式化字符串错误漏洞，该漏洞源于根据卡标签中的格式化字符串的方式，有可能泄露内核栈内存，还有可能由于内核模块在按要求提供卡片标签时崩溃而造成DoS（例如，在一排有许多%s修饰的情况下出现）。
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
umlaeute umlaeute/v4l2loopback unspecified ~ 0.12.6 -

II. Public POCs for CVE-2022-2652

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III. Intelligence Information for CVE-2022-2652

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Patches & Fixes for CVE-2022-2652 (1)

Vendor Advisories for CVE-2022-2652 (1)

IV. Related Vulnerabilities

Same weakness: CWE-134

V. Comments for CVE-2022-2652

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