Bug 2266440 (CVE-2021-46921)

Summary:	CVE-2021-46921 kernel: locking/qrwlock: Fix ordering in queued_write_lock_slowpath()
Product:	[Other] Security Response	Reporter:	Nick Tait <ntait>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, scweaver, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		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:	2266441
Bug Blocks:	2266445

Description Nick Tait 2024-02-27 21:34:35 UTC

In the Linux kernel, the following vulnerability has been resolved:

locking/qrwlock: Fix ordering in queued_write_lock_slowpath()

The Linux kernel CVE team has assigned CVE-2021-46921 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022732-CVE-2021-46921-91dc@gregkh/T/#u

Comment 1 Nick Tait 2024-02-27 21:35:13 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266441]

Comment 5 Justin M. Forbes 2024-02-27 22:56:50 UTC

This was fixed for Fedora with the 5.11.17 stable kernel updates.

Comment 7 Alex 2024-06-09 16:21:27 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46921 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.