Bug 2267162 (CVE-2021-47066)

Summary:	CVE-2021-47066 kernel: async_xor: increase src_offs when dropping destination page cause data corruption
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, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, ldoskova, lgoncalv, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.37, kernel 5.11.21, kernel 5.12.4, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A data corruption flaw was found in the Linux kernel.	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:	2267163
Bug Blocks:	2267188

Description Avinash Hanwate 2024-03-01 04:47:54 UTC

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

async_xor: increase src_offs when dropping destination page

The Linux kernel CVE team has assigned CVE-2021-47066 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022954-CVE-2021-47066-02e0@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-03-01 04:48:32 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2267163]

Comment 5 Justin M. Forbes 2024-03-01 21:12:33 UTC

This was fixed for Fedora with the 5.12.4 stable kernel updates.

Comment 7 Alex 2024-06-09 15:10:08 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47066 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags DANGER DISK  ; 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.