Bug 2077560 (CVE-2022-1419)

Summary:	CVE-2022-1419 kernel: a concurrency use-after-free in vgem_gem_dumb_create
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, security-response-team, steved, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.6 rc2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-29 20:31:33 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:	2090708
Bug Blocks:	2077551, 2090709

Description Marian Rehak 2022-04-21 15:05:24 UTC

The root cause of this vulnerability is that the ioctl$DRM_IOCTL_MODE_DESTROY_DUMB can decrease refcount of *drm_vgem_gem_object *(created in *vgem_gem_dumb_create*) concurrently, and  *vgem_gem_dumb_create *will access the freed drm_vgem_gem_object.

Comment 1 Marian Rehak 2022-05-26 12:13:39 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2090708]

Comment 5 Rohit Keshri 2022-05-29 16:44:46 UTC

There was no shipped kernel version that was seen affected by this problem. These files are not built in our source code.

Comment 6 Product Security DevOps Team 2022-05-29 20:31:29 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-2022-1419

Comment 7 Justin M. Forbes 2022-05-30 16:12:04 UTC

This was fixed for Fedora with the 5.5.5 stable kernel updates.