Bug 2271459 (CVE-2021-47179)

Summary:	CVE-2021-47179 kernel: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
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, 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 4.9.271, kernel 4.14.235, kernel 4.19.193, kernel 5.4.124, kernel 5.10.42, kernel 5.12.9	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability in the Linux kernel's NFSv4 subsystem caused a NULL pointer dereference in pnfs_mark_matching_lsegs_return(). This issue occurred because _pnfs_return_layout() passed a NULL pnfs_layout_range argument, which was not checked before dereferencing, leading to a system crash.	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:	2271579

Description Mauro Matteo Cascella 2024-03-25 17:28:52 UTC

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

NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()

The Linux kernel CVE team has assigned CVE-2021-47179 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024032538-CVE-2021-47179-d9c2@gregkh/T

Comment 2 Alex 2024-06-09 13:18:49 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47179 is: 	SKIP	The Fixes patch not applied yet, so unlikely that actual: de144ff4234f935bd2150108019b5d87a90a8a96	YES			NO	YES	unknown (where first YES/NO value means if related sources built).