Bug 2127985 (CVE-2022-3239)

Summary:	CVE-2022-3239 kernel: media: em28xx: initialize refcount before kref_get
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, 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, sgrubb, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Linux kernel 5.18-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in the Linux kernel’s video4linux driver in how a user triggers the em28xx_usb_probe() for the Empia 28xx-based TV cards. 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 19:42:04 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:	2061574, 2128001, 2128003, 2128004, 2128005, 2128006
Bug Blocks:	2078926

Description Alex 2022-09-19 14:16:25 UTC

A vulnerability was found in Linux Kernel video4linux driver for Empia 28xx.
Refcount leak could happen in em28xx_usb_probe() causing use-after-free which might lead to privilege escalations.
The reason is the call kref_get function before kref_init finished in em28xx_usb_probe.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c08eadca1bdfa099e20a32f8fa4b52b2f672236d

Comment 2 Alex 2022-09-19 14:50:47 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2128001]

Comment 6 Justin M. Forbes 2022-09-20 14:30:30 UTC

This was fixed for Fedora with the 5.16.19 stable kernel updates.

Comment 12 Mauro Matteo Cascella 2023-05-10 12:23:22 UTC

The kernel packages as shipped in Red Hat Enterprise Linux 9 were previously updated to a version that contains the fix via the following errata:

kernel in Red Hat Enterprise Linux 9
https://access.redhat.com/errata/RHSA-2022:8267

kernel-rt in Red Hat Enterprise Linux 9
https://access.redhat.com/errata/RHSA-2022:7933

Comment 13 errata-xmlrpc 2023-05-16 08:05:05 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 14 errata-xmlrpc 2023-05-16 08:33:56 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 15 Product Security DevOps Team 2023-05-16 19:42:00 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-2022-3239

Comment 18 errata-xmlrpc 2024-02-21 00:26:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0930 https://access.redhat.com/errata/RHSA-2024:0930