Bug 2266365 (CVE-2021-46927)

Summary:	CVE-2021-46927 kernel: nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
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, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		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:	2266367
Bug Blocks:	2266445

Description Mauro Matteo Cascella 2024-02-27 17:15:56 UTC

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

nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert

The Linux kernel CVE team has assigned CVE-2021-46927 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022749-CVE-2021-46927-ae70@gregkh/T/#u

Comment 1 Mauro Matteo Cascella 2024-02-27 17:16:35 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266367]

Comment 6 Justin M. Forbes 2024-02-27 18:32:12 UTC

This was fixed for Fedora with the 5.15.13 stable kernel updates.

Comment 9 Alex 2024-06-09 15:11:08 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46927 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags READ VIRT  ; 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.