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Test ID:
Category:CentOS Local Security Checks
Title:CentOS Update for kernel CESA-2012:1061 centos5
Summary:The remote host is missing an update for the 'kernel'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'kernel'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security fix:

* The fix for CVE-2011-1083 (RHSA-2012:0150) introduced a flaw 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)

Bug fixes:

* The qla2xxx driver handled interrupts for QLogic Fibre Channel adapters
incorrectly due to a bug in a test condition for MSI-X support. This update
corrects the bug and qla2xxx now handles interrupts as expected.

* A process scheduler did not handle RPC priority wait queues correctly.
Consequently, the process scheduler failed to wake up all scheduled tasks
as expected after RPC timeout, which caused the system to become
unresponsive and could significantly decrease system performance. This
update modifies the process scheduler to handle RPC priority wait queues as
expected. All scheduled tasks are now properly woken up after RPC timeout
and the system behaves as expected. (BZ#817571)

* The kernel version 2.6.18-308.4.1.el5 contained several bugs which led to
an overrun of the NFS server page array. Consequently, any attempt to
connect an NFS client running on Red Hat Enterprise Linux 5.8 to the NFS
server running on the system with this kernel caused the NFS server to
terminate unexpectedly and the kernel to panic. This update corrects the
bugs causing NFS page array overruns and the kernel no longer crashes in
this scenario. (BZ#820358)

* An insufficiently designed calculation in the CPU accelerator in the
previous kernel caused an arithmetic overflow in the sched_clock() function
when system uptime exceeded 208.5 days. This overflow led to a kernel panic
on the systems using the Time Stamp Counter (TSC) or Virtual Machine
Interface (VMI) clock source. This update corrects the calculation so that
this arithmetic overflow and kernel panic can no longer occur under these

Note: This advisory does not include a fix for this bug for the 32-bit
architecture. (BZ#824654)

* Under memory pressure, memory pages that are still a part of a
checkpointing transaction can be invalidated. However, when the pages were
invalidated, the journal head was re-filed onto the transactions' 'forget'
list, which caused the current running transaction's block to be modified.
As a result, block accounting was not properly performed on that modified
block because it appeared to have al ...

Description truncated, please see the referenced URL(s) for more information.

Affected Software/OS:
kernel on CentOS 5

Please install the updated packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2012-3375
Common Vulnerability Exposure (CVE) ID: CVE-2011-1083
RedHat Security Advisories: RHSA-2012:0862
SuSE Security Announcement: SUSE-SU-2012:0554 (Google Search)
SuSE Security Announcement: SUSE-SU-2012:0616 (Google Search)
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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