Synopsis:          Important: kernel security and bug fix update
Issue Date:        2012-10-02
CVE Numbers:       CVE-2012-3430
                    CVE-2012-2319
                    CVE-2012-3412
                    CVE-2012-3510
--

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

This update fixes the following security issues:

* A flaw was found in the way socket buffers (skb) requiring TSO (TCP
segment offloading) were handled by the sfc driver. If the skb did not fit
within the minimum-size of the transmission queue, the network card could
repeatedly reset itself. A remote attacker could use this flaw to cause a
denial of service. (CVE-2012-3412, Important)

* A use-after-free flaw was found in the xacct_add_tsk() function in the
Linux kernel's taskstats subsystem. A local, unprivileged user could use
this flaw to cause an information leak or a denial of service.
(CVE-2012-3510, Moderate)

* A buffer overflow flaw was found in the hfs_bnode_read() function in the
HFS Plus (HFS+) file system implementation in the Linux kernel. A local
user able to mount a specially-crafted HFS+ file system image could use
this flaw to cause a denial of service or escalate their privileges.
(CVE-2012-2319, Low)

* A flaw was found in the way the msg_namelen variable in the rds_recvmsg()
function of the Linux kernel's Reliable Datagram Sockets (RDS) protocol
implementation was initialized. A local, unprivileged user could use this
flaw to leak kernel stack memory to user-space. (CVE-2012-3430, Low)

This update also fixes the following bugs:

* The cpuid_whitelist() function, masking the Enhanced Intel SpeedStep
(EST) flag from all guests, prevented the "cpuspeed" service from working
in the privileged Xen domain (dom0). CPU scaling was therefore not
possible. With this update, cpuid_whitelist() is aware whether the domain
executing CPUID is privileged or not, and enables the EST flag for dom0.

* If a delayed-allocation write was performed before quota was enabled,
the kernel displayed the following warning message:

     WARNING: at fs/quota/dquot.c:988 dquot_claim_space+0x77/0x112()

This was because information about the delayed allocation was not recorded
in the quota structure. With this update, writes prior to enabling quota
are properly accounted for, and the message is not displayed.

* Some subsystems clear the TIF_SIGPENDING flag during error handling in
fork() paths. Previously, if the flag was cleared, the ERESTARTNOINTR error
code could be returned. The underlying source code has been modified so
that the error code is no longer returned.
* An unnecessary check for the RXCW.CW bit could cause the Intel e1000e NIC
(Network Interface Controller) to not work properly. The check has been
removed so that the Intel e1000e NIC works as expected.

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.
--

SL5
   x86_64
     kernel-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-debug-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-debug-devel-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-devel-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-headers-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-xen-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-xen-devel-2.6.18-308.16.1.el5.x86_64.rpm
     kernel-module-aufs-2.6.18-308.16.1.el5-0.20090202.cvs-6.sl5.x86_64.rpm
 
kernel-module-aufs-2.6.18-308.16.1.el5xen-0.20090202.cvs-6.sl5.x86_64.rpm
     kernel-module-ipw3945-2.6.18-308.16.1.el5-1.2.0-2.sl5.x86_64.rpm
     kernel-module-ipw3945-2.6.18-308.16.1.el5xen-1.2.0-2.sl5.x86_64.rpm
     kernel-module-ndiswrapper-2.6.18-308.16.1.el5-1.55-1.SL.x86_64.rpm
     kernel-module-ndiswrapper-2.6.18-308.16.1.el5xen-1.55-1.SL.x86_64.rpm
     kernel-module-openafs-2.6.18-308.16.1.el5-1.4.14-80.1.sl5.x86_64.rpm
     kernel-module-openafs-2.6.18-308.16.1.el5xen-1.4.14-80.1.sl5.x86_64.rpm
   i386
     kernel-2.6.18-308.16.1.el5.i686.rpm
     kernel-PAE-2.6.18-308.16.1.el5.i686.rpm
     kernel-PAE-devel-2.6.18-308.16.1.el5.i686.rpm
     kernel-debug-2.6.18-308.16.1.el5.i686.rpm
     kernel-debug-devel-2.6.18-308.16.1.el5.i686.rpm
     kernel-devel-2.6.18-308.16.1.el5.i686.rpm
     kernel-headers-2.6.18-308.16.1.el5.i386.rpm
     kernel-xen-2.6.18-308.16.1.el5.i686.rpm
     kernel-xen-devel-2.6.18-308.16.1.el5.i686.rpm
     kernel-module-aufs-2.6.18-308.16.1.el5-0.20090202.cvs-6.sl5.i686.rpm
     kernel-module-aufs-2.6.18-308.16.1.el5PAE-0.20090202.cvs-6.sl5.i686.rpm
     kernel-module-aufs-2.6.18-308.16.1.el5xen-0.20090202.cvs-6.sl5.i686.rpm
     kernel-module-ipw3945-2.6.18-308.16.1.el5-1.2.0-2.sl5.i686.rpm
     kernel-module-ipw3945-2.6.18-308.16.1.el5PAE-1.2.0-2.sl5.i686.rpm
     kernel-module-ipw3945-2.6.18-308.16.1.el5xen-1.2.0-2.sl5.i686.rpm
     kernel-module-ndiswrapper-2.6.18-308.16.1.el5-1.55-1.SL.i686.rpm
     kernel-module-ndiswrapper-2.6.18-308.16.1.el5PAE-1.55-1.SL.i686.rpm
     kernel-module-ndiswrapper-2.6.18-308.16.1.el5xen-1.55-1.SL.i686.rpm
     kernel-module-openafs-2.6.18-308.16.1.el5-1.4.14-80.1.sl5.i686.rpm
     kernel-module-openafs-2.6.18-308.16.1.el5PAE-1.4.14-80.1.sl5.i686.rpm
     kernel-module-openafs-2.6.18-308.16.1.el5xen-1.4.14-80.1.sl5.i686.rpm
     kernel-module-xfs-2.6.18-308.16.1.el5-0.4-2.sl5.i686.rpm
     kernel-module-xfs-2.6.18-308.16.1.el5PAE-0.4-2.sl5.i686.rpm
     kernel-module-xfs-2.6.18-308.16.1.el5xen-0.4-2.sl5.i686.rpm
   noarch
     kernel-doc-2.6.18-308.16.1.el5.noarch.rpm

- Scientific Linux Development Team