Bug 2267935 (CVE-2021-47090)

Summary:	CVE-2021-47090 kernel: mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, aubaker, 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, 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 5.10.89, kernel 5.15.12, kernel 5.16	Doc Type:	If docs needed, set a value
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:
Bug Blocks:	2268181

Description Zack Miele 2024-03-05 16:05:37 UTC

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

mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()

The Linux kernel CVE team has assigned CVE-2021-47090 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030413-CVE-2021-47090-a429@gregkh/T

Comment 4 Audra Mitchell 2024-03-12 20:22:17 UTC

We have the fix for this issue in both RHEL8 and RHEL9:

$ kerneloscope downstream 2a57d83c78f8
557359d4abbd (in rhel-8.7, rhel-8.8, rhel-8.9, rhel-8.10) mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()
ce8d02be3349 (in rhel-9.0, rhel-9.1, rhel-9.2, rhel-9.3, rhel-9.4) mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()

Comment 5 Alex 2024-06-09 15:18:09 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47090 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags READ DANGER RACE  ; these flags parsed automatically based on patche 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.