Bug 2129859 (CVE-2022-3303)

Summary:	CVE-2022-3303 kernel: race condition in snd_pcm_oss_sync leads to NULL pointer dereference
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, chwhite, crwood, ddepaula, debarbos, dvlasenk, ezulian, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.0-rc5	Doc Type:	If docs needed, set a value
Doc Text:	A race condition flaw was found in the Linux kernel sound subsystem due to improper locking. It could lead to a NULL pointer dereference while handling the SNDCTL_DSP_SYNC ioctl. A privileged local user (root or member of the audio group) could use this flaw to crash the system, resulting in a denial of service condition.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2129874, 2129878, 2129879, 2129880, 2129881
Bug Blocks:	2126492

Description Mauro Matteo Cascella 2022-09-26 13:12:27 UTC

A race condition issue leading to NULL pointer dereference was found in the Linux kernel sound subsystem. A privileged local user (root or member of the audio group) could use this flaw to crash the system, resulting in a denial of service condition.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8423f0b6d513b259fdab9c9bf4aaa6188d054c2d
https://lore.kernel.org/all/CAFcO6XN7JDM4xSXGhtusQfS2mSBcx50VJKwQpCq=WeLt57aaZA@mail.gmail.com/

Comment 1 Mauro Matteo Cascella 2022-09-26 14:06:40 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2129874]

Comment 3 Justin M. Forbes 2022-09-28 15:57:32 UTC

This was fixed for Fedora with the 5.19.9 stable kernel updates.