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)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2014-9065, CVE-2014-9066, xsa114
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1167952
TreeView+ depends on / blocked
 
Reported: 2014-11-25 17:08 UTC by Petr Matousek
Modified: 2021-02-17 05:58 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-11-25 17:11:19 UTC


Attachments (Terms of Use)

Description Petr Matousek 2014-11-25 17:08:58 UTC
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 17:11:19 UTC
Statement:

Not vulnerable.

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


Note You need to log in before you can comment on or make changes to this bug.