Bug 2221702 (CVE-2023-4133)

Summary:	CVE-2023-4133 kernel: cxgb4: use-after-free in ch_flower_stats_cb()
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, tglozar, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.3	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user to crash the system, causing a denial of service condition.	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:	2221712, 2221713, 2228787, 2228789, 2228790
Bug Blocks:	2221670

Description Mauro Matteo Cascella 2023-07-10 15:34:32 UTC

From the upstream fix below: The flower_stats_timer can schedule flower_stats_work and flower_stats_work can also arm the flower_stats_timer [..] When the cxgb4 device is detaching, the timer and workqueue could still be rearmed. As a result, a possible use-after-free bug could happen.

Upstream commit:
https://github.com/torvalds/linux/commit/e50b9b9e8610d47b7c22529443e45a16b1ea3a15

Comment 2 Mauro Matteo Cascella 2023-08-03 09:31:06 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2228787]

Comment 4 Justin M. Forbes 2023-08-07 22:09:28 UTC

This was fixed for Fedora with the 6.2.13 stable kernel updates.

Comment 5 errata-xmlrpc 2024-04-30 10:11:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394

Comment 6 errata-xmlrpc 2024-05-22 09:14:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2950 https://access.redhat.com/errata/RHSA-2024:2950

Comment 7 errata-xmlrpc 2024-05-22 09:50:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3138 https://access.redhat.com/errata/RHSA-2024:3138