RHEL 6 : MRG (RHSA-2012:1150)
Medium Nessus Plugin ID 76645
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionUpdated kernel-rt packages that fix two security issues and two bugs are now available for Red Hat Enterprise MRG 2.1.
The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issues :
* A memory leak flaw was found in the way the Linux kernel's memory subsystem handled resource clean up in the mmap() failure path when the MAP_HUGETLB flag was set. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-2390, Moderate)
* A flaw was found in the way the Linux kernel's Event Poll (epoll) subsystem handled resource clean up when an ELOOP error code was returned. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-3375, Moderate)
This update also fixes the following bugs :
* The MRG 2.1 realtime kernel lacked support for automatic memory reservation for the kdump kernel, as present in Red Hat Enterprise Linux kernels. Using the parameter crashkernel=auto on the kernel boot command line led to kdump being disabled because no memory was correctly reserved. Support for crashkernel=auto has been implemented in the 3.0 realtime kernel and now when the crashkernel=auto parameter is specified, machines with more than 4GB of RAM have the amount of memory required by the kdump kernel calculated and reserved.
* The current bnx2x driver in the MRG 2.1 realtime kernel had faulty support for the network adapter PCI ID 14e4:168e and did not work correctly. The bnx2x driver was updated to include support for this network adapter. (BZ#839037)
Users should upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.0.36-rt57, and correct these issues. The system must be rebooted for this update to take effect.
SolutionUpdate the affected packages.