Bug 2271432 (CVE-2021-47168)

Summary:	CVE-2021-47168 kernel: NFS: fix an incorrect limit in filelayout_decode_layout()
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, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.4.271, kernel 4.9.271, kernel 4.14.235, kernel 4.19.193, kernel 5.4.124, kernel 5.10.42, kernel 5.12.9, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the NFS implementation in Linux Kernel causing memory corruption due to an incorrect size limit in filelayout_decode_layout(). Using "sizeof(struct nfs_fh)" instead of NFS_MAXFHSIZE led to buffer overflow by two bytes leads to potential memory corruption.	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 16:18:43 UTC

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

NFS: fix an incorrect limit in filelayout_decode_layout()

The Linux kernel CVE team has assigned CVE-2021-47168 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024032536-CVE-2021-47168-2916@gregkh/T

Comment 3 Alex 2024-06-09 13:40:00 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47168 is: 	SKIP	The Fixes patch not applied yet, so unlikely that actual: 16b374ca439fb406e46e071f75428f5b033056f8	YES			NO	YES	unknown (where first YES/NO value means if related sources built).