This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.
The remote Red Hat host is missing one or more security updates.
Updated kernel packages that fix two security issues and several bugs
are now available for Red Hat Enterprise Linux 5.
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 packages contain the Linux kernel, the core of any Linux
* A NULL pointer dereference flaw was found in the
rds_iw_laddr_check() function in the Linux kernel's implementation of
Reliable Datagram Sockets (RDS). A local, unprivileged user could use
this flaw to crash the system. (CVE-2014-2678, Moderate)
* It was found that the Xen hypervisor implementation did not properly
clean memory pages previously allocated by the hypervisor. A
privileged guest user could potentially use this flaw to read data
relating to other guests or the hypervisor itself. (CVE-2014-4021,
Red Hat would like to thank the Xen project for reporting
CVE-2014-4021. Upstream acknowledges Jan Beulich as the original
This update also fixes the following bugs :
* A bug in the journaling block device (jbd and jbd2) code could,
under certain circumstances, trigger a BUG_ON() assertion and result
in a kernel oops. This happened when an application performed an
extensive number of commits to the journal of the ext3 file system and
there was no currently active transaction while synchronizing the
file's in-core state. This problem has been resolved by correcting
respective test conditions in the jbd and jbd2 code. (BZ#1097528)
* After a statically defined gateway became unreachable and its
corresponding neighbor entry entered a FAILED state, the gateway
stayed in the FAILED state even after it became reachable again. As a
consequence, traffic was not routed through that gateway. This update
allows probing such a gateway automatically so that the traffic can be
routed through this gateway again once it becomes reachable.
* Due to an incorrect condition check in the IPv6 code, the ipv6
driver was unable to correctly assemble incoming packet fragments,
which resulted in a high IPv6 packet loss rate. This update fixes the
said check for a fragment overlap and ensures that incoming IPv6
packet fragments are now processed as expected. (BZ#1107932)
* Recent changes in the d_splice_alias() function introduced a bug
that allowed d_splice_alias() to return a dentry from a different
directory than the directory being looked up. As a consequence in
cluster environment, a kernel panic could be triggered when a
directory was being removed while a concurrent cross-directory
operation was performed on this directory on another cluster node.
This update avoids the kernel panic in this situation by correcting
the search logic in the d_splice_alias() function so that the function
can no longer return a dentry from an incorrect directory.
* The NFSv4 server did not handle multiple OPEN operations to the same
file separately, which could cause the NFSv4 client to repeatedly send
CLOSE requests with the same state ID, even though the NFS server
rejected the request with an NFS4ERR_OLD_STATEID (10024) error code.
This update ensures that the NFSv4 client no longer re-sends the same
CLOSE request after receiving NFS4ERR_OLD_STATEID. (BZ#1113468)
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 :
Update the affected packages.
Risk factor :
Medium / CVSS Base Score : 4.7
CVSS Temporal Score : 4.1
Public Exploit Available : false