mailing list archives
Re: CVE request -- Linux kernel: mm/hotplug: failure in propagating hot-added memory to other nodes
From: Petr Matousek <pmatouse () redhat com>
Date: Tue, 13 Nov 2012 16:36:23 +0100
On Tue, Nov 13, 2012 at 04:21:19PM +0100, Marcus Meissner wrote:
On Sun, Nov 11, 2012 at 12:19:13AM -0700, Kurt Seifried wrote:
On 11/10/2012 02:36 PM, Petr Matousek wrote:
A NULL pointer dereference flaw has been found in the way a new
node's hot-added memory is propagated to other nodes zonelists. An
unprivileged local user can use this flaw to crash the system.
Please use CVE-2012-5517 for this issue.
Our Mel Gorman wonders how this is a security issue.
A local attacker would need to wait for the administrator to hot-add
memory, which seems unlikely on first thought?
Yes, it is unlikely, but not impossible. This unlikely condition
is reflected in the CVSSv2  score -- AC:H -- which Red Hat uses to
rate the severity of the security issues and also reflected in the
impact rating .
Petr Matousek / Red Hat Security Response Team