Bug 2282334 (CVE-2021-47402)

Summary:	CVE-2021-47402 kernel: net: sched: flower: protect fl_walk() with rcu
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 5.4.151, kernel 5.10.71, kernel 5.14.10, kernel 5.15	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's netfilter subsystem, where a use-after-free vulnerability was identified in the fl_walk() function of the Flower traffic classifier, this issue arises because the function, which iterates over filters, no longer retains proper RCU protection leading to potential use-after-free.	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:	2282371

Description ybuenos 2024-05-22 08:42:03 UTC

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

net: sched: flower: protect fl_walk() with rcu

The Linux kernel CVE team has assigned CVE-2021-47402 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052149-CVE-2021-47402-6c19@gregkh/T