[Ksplice][EL6-Updates] New updates available via Ksplice (RHSA-2012:0571-1)

[Sasha Levin]

Synopsis: RHSA-2012:0571-1 can now be patched using Ksplice
CVEs: CVE-2011-4086 CVE-2012-1601

Systems running Red Hat Enterprise Linux 6, CentOS 6, and Scientific
Linux 6 can now use Ksplice to patch against the latest Red Hat
Security Advisory, RHSA-2012:0571-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on RHEL 6, CentOS 6,
and Scientific Linux 6 install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* Denial of service due to race condition in the scheduler subsystem.

A race condition between exiting a task on one CPU and waking it up by a
different CPU can cause a kernel panic when the second task will try
waking up a dead task.


* CVE-2011-4086: Denial of service in journaling block device.

The journal block device assumed that a buffer marked as unwritten
or delay could be live without checking if the buffer was mapped.

An unprivileged local user could use this flaw to crash the system.


* CVE-2012-1601: Denial of service in KVM VCPU creation.

Inconsistent state in the creation of KVM virtual CPU's could
lead to NULL pointer dereferences.  A unprivileged local user
could use this flaw to crash the system.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.