Bug 2122960 (CVE-2022-41218)

Summary:	CVE-2022-41218 kernel: Report vmalloc UAF in dvb-core/dmxdev
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dvlasenk, ezulian, 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 the Linux kernel’s dvb-core subsystem (DVB API used by Digital TV devices) in how a user physically removed a USB device (such as a DVB demultiplexer device) while running malicious code. This flaw allows a local user to crash or potentially escalate their privileges on the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-16 19:15:56 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:	2123301, 2123302, 2123303, 2123304, 2137259
Bug Blocks:	2122950

Description Alex 2022-08-31 12:53:27 UTC

A flaw in the Linux Kernel dvb-core sub system (DVB API used by Digital TV devices) found.
The result of race condition inside drivers/media/dvb-core/dmxdev.c is use after free.
For triggering attack the local user have to physically remove USB device (like DVB demultiplexer device), and both run some malicious code.

Reference:
https://www.openwall.com/lists/oss-security/2022/09/23/4

Comment 3 Alex 2022-10-24 09:03:51 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2137259]

Comment 4 Alex 2022-12-07 10:02:52 UTC

Patch:
https://lore.kernel.org/all/20220908132754.30532-1-tiwai@suse.de/

Comment 7 Justin M. Forbes 2023-01-19 22:59:26 UTC

This was fixed for Fedora with the 6.0.18 stable kernel updates.

Comment 10 errata-xmlrpc 2023-05-16 08:04:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2736 https://access.redhat.com/errata/RHSA-2023:2736

Comment 11 errata-xmlrpc 2023-05-16 08:33:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2951 https://access.redhat.com/errata/RHSA-2023:2951

Comment 12 Product Security DevOps Team 2023-05-16 19:15:53 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-2022-41218

Comment 15 errata-xmlrpc 2024-01-24 16:42:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0412 https://access.redhat.com/errata/RHSA-2024:0412