Bug 2283406 (CVE-2021-47544)

Summary:	CVE-2021-47544 kernel: tcp: fix page frag corruption on page fault
Product:	[Other] Security Response	Reporter:	ybuenos
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, trathi, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.84, kernel 5.15.7, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's TCP subsystem in the tcp_sendmsg_locked() function, which can lead to page fragment corruption during a page fault, which occurs when a TCP stream experiences nested access to the task page fragment due to a page fault while handling memory-mapped user-space data from a CIFS mount.	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:	2283495

Description ybuenos 2024-05-27 10:00:30 UTC

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

tcp: fix page frag corruption on page fault

The Linux kernel CVE team has assigned CVE-2021-47544 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052440-CVE-2021-47544-ceb5@gregkh/T

Comment 2 Alex 2024-06-09 14:38:21 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47544 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown	 (where first YES/NO value means if related sources built).