Bug 2269181 (CVE-2023-52493)

Summary:	CVE-2023-52493 kernel: bus: mhi: host: Drop chan lock before queuing buffers
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
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, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.210, kernel 5.15.149, kernel 6.1.76, kernel 6.6.15, kernel 6.7.3, kernel 6.8-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux Kernel. Read and write locks for the channel are taken in succession by dropping the read lock from parse_xfer_event(), such that a callback given to client can potentially queue buffers and acquire the write lock in that process. This can result in multiple locks and a soft lockup, leading to compromised Availability.	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:	2269182
Bug Blocks:	2269239

Description Marco Benatto 2024-03-12 15:49:35 UTC

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

bus: mhi: host: Drop chan lock before queuing buffers

The Linux kernel CVE team has assigned CVE-2023-52493 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/20240229155245.1571576-34-lee@kernel.org/T

Comment 1 Marco Benatto 2024-03-12 15:50:14 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2269182]

Comment 2 Justin M. Forbes 2024-03-26 16:47:24 UTC

This was fixed for Fedora with the 6.7.3 stable kernel updates.

Comment 3 Alex 2024-06-09 15:28:32 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2023-52493 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags LOCK SIMPLEFIX  ; these flags parsed automatically based on patche data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.