Bug 2266924 (CVE-2021-46977)

Summary:	CVE-2021-46977 kernel: KVM: VMX: Disable preemption when probing user return MSRs
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
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, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.38, kernel 5.11.22, kernel 5.12.5, kernel 5.13	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:	2266925
Bug Blocks:	2266939

Description Avinash Hanwate 2024-02-29 08:54:07 UTC

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

KVM: VMX: Disable preemption when probing user return MSRs

The Linux kernel CVE team has assigned CVE-2021-46977 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022822-CVE-2021-46977-76be@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-02-29 08:54:47 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266925]

Comment 5 Justin M. Forbes 2024-02-29 21:36:23 UTC

This was fixed for Fedora with the 5.12.5 stable kernel updates.

Comment 6 Alex 2024-06-09 12:37:56 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46977 is: 	SKIP	The Fixes patch not applied yet, so unlikely that actual: 4be5341026246870818e28b53202b001426a5aec	YES			NO	YES	unknown (where first YES/NO value means if related sources built).