864442 – (CVE-2022-2652) media-video/v4l2loopback: kernel stack memory leak via format string vulnerability

Bug 864442 (CVE-2022-2652) - media-video/v4l2loopback: kernel stack memory leak via format string vulnerability

Summary: media-video/v4l2loopback: kernel stack memory leak via format string vulnerab...

Status:	CONFIRMED

Alias:	CVE-2022-2652

Product:	Gentoo Security
Classification:	Unclassified
Component:	Vulnerabilities (show other bugs)
Hardware:	All Linux

Importance:	Normal minor (vote)
Assignee:	Gentoo Security

URL:	https://huntr.dev/bounties/1b055da5-7...
Whiteboard:	B4 [upstream/ebuild]
Keywords:

Depends on:
Blocks:

Reported:	2022-08-08 17:32 UTC by John Helmert III
Modified:	2022-08-08 17:32 UTC (History)
CC List:	1 user (show)

See Also:
Package list:
Runtime testing required:	---

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Description John Helmert III archtester

2022-08-08 17:32:45 UTC

CVE-2022-2652:

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).

Unreleased patch: https://github.com/umlaeute/v4l2loopback/commit/e4cd225557486c420f6a34411f98c575effd43dd