Bug 851172 - (CVE-2012-3496) CVE-2012-3496 kernel: xen: XENMEM_populate_physmap DoS vulnerability
CVE-2012-3496 kernel: xen: XENMEM_populate_physmap DoS vulnerability
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
: Security
Depends On: 854590
Blocks: 851204
  Show dependency treegraph
Reported: 2012-08-23 08:09 EDT by Petr Matousek
Modified: 2015-11-06 11:33 EST (History)
5 users (show)

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

Attachments (Terms of Use)

  None (edit)
Description Petr Matousek 2012-08-23 08:09:16 EDT
XENMEM_populate_physmap can be called with invalid flags.  By calling it with MEMF_populate_on_demand flag set, a BUG can be triggered if a translating paging mode is not being used.

A malicious guest kernel can crash the host.


Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Matthew Daley as the original reporter.
Comment 3 Petr Matousek 2012-08-23 08:10:47 EDT

Not vulnerable.

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

This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Comment 4 Petr Matousek 2012-09-05 07:46:39 EDT
Now public via:

Comment 5 Petr Matousek 2012-09-05 07:47:45 EDT
Created xen tracking bugs for this issue

Affects: fedora-all [bug 854590]
Comment 6 Fedora Update System 2012-09-17 14:00:06 EDT
xen-4.1.3-2.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

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