RHEL 5 : kernel (RHSA-2014:1143)

This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.

Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated kernel packages that fix one security issue and several bugs
are now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.

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

* An out-of-bounds memory access flaw was found in the Linux kernel's
system call auditing implementation. On a system with existing audit
rules defined, a local, unprivileged user could use this flaw to leak
kernel memory to user space or, potentially, crash the system.
(CVE-2014-3917, Moderate)

This update also fixes the following bugs :

* A bug in the journaling code (jbd and jbd2) could, under very heavy
workload of fsync() operations, trigger a BUG_ON and result in a
kernel oops. Also, fdatasync() could fail to immediately write out
changes in the file size only. These problems have been resolved by
backporting a series of patches that fixed these problems in the
respective code on Red Hat Enterprise Linux 6. This update also
improves performance of ext3 and ext4 file systems. (BZ#1116027)

* Due to a bug in the ext4 code, the fdatasync() system call did not
force the inode size change to be written to the disk if it was the
only metadata change in the file. This could result in the wrong inode
size and possible data loss if the system terminated unexpectedly. The
code handling inode updates has been fixed and fdatasync() now writes
data to the disk as expected in this situation. (BZ#1117665)

* A workaround to a DMA read problem in the tg3 driver was incorrectly
applied to the whole Broadcom 5719 and 5720 chipset family. This
workaround is valid only to the A0 revision of the 5719 chips and for
other revisions and chips causes occasional Tx timeouts. This update
correctly applies the aforementioned workaround only to the A0
revision of the 5719 chips. (BZ#1121017)

* Due to a bug in the page writeback code, the system could become
unresponsive when being under memory pressure and heavy NFS load. This
update fixes the code responsible for handling of dirty pages, and
dirty page write outs no longer flood the work queue. (BZ#1125246)

All kernel users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. The system
must be rebooted for this update to take effect.

See also :


Solution :

Update the affected packages.

Risk factor :

Low / CVSS Base Score : 3.3

Family: Red Hat Local Security Checks

Nessus Plugin ID: 77518 ()

Bugtraq ID:

CVE ID: CVE-2014-3917

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