Bug 2267190 (CVE-2021-47068)

Summary:	CVE-2021-47068 kernel: net/nfc: fix use-after-free llcp_sock_bind/connect
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
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, jforbes, 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 4.4.269, kernel 4.9.269, kernel 4.14.233, kernel 4.19.191, kernel 5.4.119, kernel 5.10.37, kernel 5.11.21, kernel 5.12.4, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel’s Near Field Communication (NFC) subsystem. The issue involves a use-after-free condition introduced by commits to fix reference count leaks. This vulnerability can be triggered if the same local address is assigned to two different sockets, leading to a potential system crash or other unpredictable behavior.	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:	2267191
Bug Blocks:	2267188

Description Avinash Hanwate 2024-03-01 05:13:20 UTC

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

net/nfc: fix use-after-free llcp_sock_bind/connect

The Linux kernel CVE team has assigned CVE-2021-47068 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022955-CVE-2021-47068-a416@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-03-01 05:13:56 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2267191]

Comment 2 Justin M. Forbes 2024-03-01 18:08:33 UTC

This was fixed for Fedora with the 5.12.4 stable kernel updates.

Comment 4 Alex 2024-06-09 13:16:21 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47068 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown (where first YES/NO value means if related sources built).