Bug 2134440 (CVE-2022-42719)

Summary:	CVE-2022-42719 kernel: A use-after-free problem observed in multi-BSSID element when parsing
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dhoward, dvlasenk, ezulian, fhrbata, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, security-response-team, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in ieee802_11_parse_elems_full in the net/mac80211/util.c function in the multi-BSSID element. This issue occurs while parsing in the Linux kernel.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-29 19:27:26 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:	2134469
Bug Blocks:	2133534

Description Rohit Keshri 2022-10-13 12:28:51 UTC

When we parse a multi-BSSID element, we might point some element pointers into the allocated nontransmitted_profile. However, we free this before returning, causing UAF when the relevant pointers in the parsed elements are accessed.

Comment 4 Rohit Keshri 2022-10-13 12:46:25 UTC

There was no shipped kernel version that was seen affected by this problem.

Comment 5 Marian Rehak 2022-10-13 13:20:48 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2134469]

Comment 6 Product Security DevOps Team 2022-11-29 19:27:23 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-42719