Bug 1083213 (CVE-2014-2673)

Summary:	CVE-2014-2673 kernel: powerpc: tm: crash when forking inside a transaction
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, hannsj_uhl, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nobody, npajkovs, pholasek, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A flaw was found in the way the Linux kernel performed forking inside of a transaction. A local, unprivileged user on a PowerPC system that supports transactional memory could use this flaw to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-08-06 17:40:04 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:	1083214, 1083215, 1083217
Bug Blocks:	1083261

Description Petr Matousek 2014-04-01 17:23:11 UTC

A flaw was found in the way forking inside a transaction was handled in the Linux kernel.

Unprivileged local user on a POWERPC system supporting transactional memory could use this flaw to crash the system.

Upstream fix:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=621b5060e823301d0cba4cb52a7ee3491922d291

References:
http://seclists.org/oss-sec/2014/q1/701

Comment 2 Petr Matousek 2014-04-01 17:26:50 UTC

Statement:

This issue does not affect Red Hat Enterprise Linux 5 and 6 because we do not provide support for Transactional Memory on Power PC architecture.

This issue does not affect Red Hat Enterprise MRG 2 because we do not support Power PC architecture.

Comment 3 Petr Matousek 2014-04-01 17:27:46 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1083217]

Comment 4 Martin Prpič 2014-08-05 12:08:38 UTC

IssueDescription:

A flaw was found in the way the Linux kernel performed forking inside of a transaction. A local, unprivileged user on a PowerPC system that supports transactional memory could use this flaw to crash the system.

Comment 5 errata-xmlrpc 2014-08-06 17:10:42 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1023 https://rhn.redhat.com/errata/RHSA-2014-1023.html