Bug 2248430 (CVE-2023-47233)

Summary:	CVE-2023-47233 kernel: Use after free in brcmf_cfg80211_escan_timeout_worker in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mstowell, nmurray, ptalbert, rogbas, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang, zmiele
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A use-after-free issue was found in the brcm80211 component in the Linux kernel, which may be triggered by a physical attacker while disconnecting a device.	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:	2248431
Bug Blocks:	2281794, 2248432

Description Pedro Sampaio 2023-11-07 02:04:10 UTC

The brcm80211 component in the Linux kernel through 6.5.10 has a brcmf_cfg80211_detach use-after-free in the device unplugging (disconnect the USB by hotplug) code. For physically proximate attackers with local access, this "could be exploited in a real world scenario." This is related to brcmf_cfg80211_escan_timeout_worker in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c.

References:

https://bugzilla.suse.com/show_bug.cgi?id=1216702
https://lore.kernel.org/all/20231104054709.716585-1-zyytlz.wz@163.com/
https://marc.info/?l=linux-kernel&m=169907678011243&w=2

Comment 1 Pedro Sampaio 2023-11-07 02:04:42 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2248431]

Comment 4 Alex 2024-05-28 09:47:18 UTC

*** Bug 2281213 has been marked as a duplicate of this bug. ***