Bug 2274577 (CVE-2021-47209)

Summary:	CVE-2021-47209 kernel: sched/fair: Prevent dead task groups from regaining cfs_rq's
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.15.5, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel's scheduling subsystem which can lead to a denial of service.	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:
Bug Blocks:	2274606

Description Marco Benatto 2024-04-11 19:22:08 UTC

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

sched/fair: Prevent dead task groups from regaining cfs_rq&#39;s

The Linux kernel CVE team has assigned CVE-2021-47209 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024041004-CVE-2021-47209-1cf6@gregkh/T

Comment 2 Alex 2024-06-09 12:43:49 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47209 is: 	SKIP	The Fixes patch not applied yet, so unlikely that actual: a7b359fc6a37faaf472125867c8dc5a068c90982	YES			NO	NO	unknown (where first YES/NO value means if related sources built).