Bug 1757356 (CVE-2016-10905)

Summary:	CVE-2016-10905 kernel: use-after-free in fs/gfs2/rgrp.c
Product:	[Other] Security Response	Reporter:	msiddiqu
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, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dominik.mierzejewski, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rpeterso, rt-maint, rvrbovsk, steved, 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 resource group management of the GFS2 filesystem. A local attacker can use this flaw to cause a use-after-free error, which can be used to crash the system, corrupt memory, or escalate privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-02-17 08:09:36 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:
Bug Blocks:	1757357

Description msiddiqu 2019-10-01 10:26:01 UTC

A flaw was found in the GFS2 filesystems resource group lock management.  A local attacker who is able to trigger actions on the gfs2 filesystem can possibly cause a use-after-free in which could possibly be abused by an attacker to crash the system, corrupt memory or escalate privileges on the system.

Upstream patch: 

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=36e4ad0316c017d5b271378ed9a1c9a4b77fab5f

Comment 6 Wade Mealing 2020-02-17 03:53:36 UTC

Mitigation:

At this time there is no known mitigation for this flaw, but systems with updated kernels are not affected.

Comment 7 Product Security DevOps Team 2020-02-17 08:09:36 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-2016-10905