Bug 2266820 (CVE-2021-46961)

Summary:	CVE-2021-46961 kernel: irqchip/gic-v3: Do not enable irqs when handling spurious interrups
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, msalter, 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 5.4.118, kernel 5.10.36, kernel 5.11.20, kernel 5.12.3, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel. Enabled irqs when handling spurious interrups may affect the availability.	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:	2266821
Bug Blocks:	2266839

Description Avinash Hanwate 2024-02-29 06:52:31 UTC

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

irqchip/gic-v3: Do not enable irqs when handling spurious interrups

The Linux kernel CVE team has assigned CVE-2021-46961 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022719-CVE-2021-46961-6212@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-02-29 06:53:08 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266821]

Comment 2 Justin M. Forbes 2024-03-01 22:29:57 UTC

This was fixed for Fedora with the 5.11.20 stable kernel updates.

Comment 5 Alex 2024-06-09 15:02:35 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46961 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags DANGER  ; 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.

Comment 12 Mark Salter 2024-07-16 14:00:32 UTC

The reported fix for this issue was backported into RHEL-8.6
The reported problem was only triggered when using pseudo-nmi which was not enabled until RHEL-8.9
This is an ARM-only problem and there is no RT kernel for Arm in RHEL-8