Bug 1167951 – CVE-2014-9065 xen: p2m lock starvation (xsa114)

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Bug 1167951 - (CVE-2014-9065, CVE-2014-9066, xsa114) CVE-2014-9065 xen: p2m lock starvation (xsa114)

Summary:	CVE-2014-9065 xen: p2m lock starvation (xsa114)

Status:	CLOSED NOTABUG

Aliases:	CVE-2014-9065, CVE-2014-9066, xsa114

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20141208,repor...
Keywords:	Security

Depends On:
Blocks:	1167952
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Reported:	2014-11-25 12:08 EST by Petr Matousek
Modified:	2015-01-06 08:00 EST (History)
CC List:	8 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-25 12:11:19 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Petr Matousek 2014-11-25 12:08:58 EST

The current read/write lock implementation is read-biased, which allows
a consistent stream of readers to starve writers indefinitely. There
are certain rwlocks where guests are capable of applying arbitrary read
pressure.

A malicious guest administrator can deny service to other tasks. If
the NMI watchdog is active, a timeout might be triggered, resulting in
a host crash.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.

Comment 2 Petr Matousek 2014-11-25 12:11:19 EST

Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

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