Bug 2237755

Summary:	netfilter: nf_tables UAF
Product:	[Other] Security Response	Reporter:	juneau
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, dbohanno, debarbos, dvlasenk, ezulian, hkrzesin, jarod, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, rkeshri, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A use-after-free vulnerability was found in the Linux kernel's netfilter: nf_tables component. This flaw allows local privilege escalation due to a race condition between the nf_tables netlink control plane transaction and the nft_set element garbage collection, where it is possible to underflow the reference counter, causing a use-after-free vulnerability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-09-07 18:07:09 UTC	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:	2235312, 2237754

Description juneau 2023-09-06 17:51:12 UTC

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.

We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8
https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8

Comment 1 Rohit Keshri 2023-09-07 18:02:54 UTC

*** Bug 2235306 has been marked as a duplicate of this bug. ***