Bug 1919893 (CVE-2020-0427)

Summary:	CVE-2020-0427 kernel: out-of-bounds reads in pinctrl subsystem.
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
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, blc, bmasney, brdeoliv, bskeggs, chwhite, dhoward, dramseur, dvlasenk, fhrbata, hdegoede, hkrzesin, itamar, jarodwilson, jeremy, jforbes, jglisse, jhunter, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, kmitts, lgoncalv, linville, masami256, mchehab, mgala, mjudeiki, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, walters, williams, wmealing
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 pinctrl system. It is possible to trigger an of bounds read due to a use after free. This could lead to local information disclosure with no additional execution privileges needed.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-03-16 19:19:47 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:	1919897, 1922902, 1922903, 1922904, 1922905, 1922906
Bug Blocks:	1919898

Description Dhananjay Arunesh 2021-01-25 11:31:47 UTC

A flaw was found in the Linux pinctrl system. It is possible to trigger an of bounds read due to a useafter free. This could lead to local information disclosure with no additional
execution privileges needed. User interaction is not needed for exploitation.

References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be4c60b563edee3712d392aaeb0943a768df7023

Comment 1 Dhananjay Arunesh 2021-01-25 11:34:03 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1919897]

Comment 2 Justin M. Forbes 2021-01-25 17:29:06 UTC

This was fixed for Fedora with the 5.5 kernel rebases.

Comment 6 Wade Mealing 2021-02-01 02:57:51 UTC

Mitigation:

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

Comment 9 errata-xmlrpc 2021-03-16 13:51:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:0856 https://access.redhat.com/errata/RHSA-2021:0856

Comment 10 errata-xmlrpc 2021-03-16 13:52:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:0857 https://access.redhat.com/errata/RHSA-2021:0857

Comment 11 Product Security DevOps Team 2021-03-16 19:19:47 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-2020-0427

Comment 12 errata-xmlrpc 2021-11-09 17:21:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4140 https://access.redhat.com/errata/RHSA-2021:4140

Comment 13 errata-xmlrpc 2021-11-09 18:23:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4356 https://access.redhat.com/errata/RHSA-2021:4356