Bug 1819399 (CVE-2019-9455)

Summary:	CVE-2019-9455 kernel: kernel pointer leak due to WARN_ON statement in video driver leads to local information disclosure
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, allarkin, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, qzhao, rt-maint, rvrbovsk, steved, vdronov, 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 flaw was found in the Linux kernel's video driver. A kernel pointer lead, due to a WARN_ON statement could lead to a local information disclosure with system execution privileges. User interaction is not needed for exploitation. The highest threat from this vulnerability is to data confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:24:51 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:	1819401, 1825616, 1825617
Bug Blocks:	1750356, 1819400

Description msiddiqu 2020-03-31 19:33:42 UTC

A vulnerability was found in the video driver in Kernel where there is a kernel pointer leak due to a WARN_ON statement. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.

References:

https://source.android.com/security/bulletin/pixel/2019-09-01

Comment 1 msiddiqu 2020-03-31 19:34:42 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1819401]

Comment 2 Justin M. Forbes 2020-04-01 15:02:37 UTC

This was fixed for Fedora with the 5.0 series kernel rebases.

Comment 8 Petr Matousek 2020-04-28 12:21:18 UTC

Statement:

This issue is marked as having Low impact because the information leak is very subtle and can be only used to break KASLR and not provide access to kernel memory content.

Comment 9 Petr Matousek 2020-04-28 12:21:23 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 11 errata-xmlrpc 2020-11-04 00:50:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4431 https://access.redhat.com/errata/RHSA-2020:4431

Comment 12 errata-xmlrpc 2020-11-04 02:22:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4609 https://access.redhat.com/errata/RHSA-2020:4609

Comment 13 Product Security DevOps Team 2020-11-04 02:24:51 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-2019-9455