CentOS Linux kernel 2.6.32-431.5.1 has just been released.

Update type(s): security and bug fix

Resolved CVEs:

CVE-2013-2929
CVE-2013-6381
CVE-2013-7263
CVE-2013-7265

* A buffer overflow flaw was found in the way the qeth_snmp_command()
function in the Linux kernel’s QETH network device driver implementation
handled SNMP IOCTL requests with an out-of-bounds length. A local,
unprivileged user could use this flaw to crash the system or, potentially,
escalate their privileges on the system. (CVE-2013-6381, Important)

* A flaw was found in the way the get_dumpable() function return value was
interpreted in the ptrace subsystem of the Linux kernel. When
‘fs.suid_dumpable’ was set to 2, a local, unprivileged local user could
use this flaw to bypass intended ptrace restrictions and obtain
potentially sensitive information. (CVE-2013-2929, Low)

* It was found that certain protocol handlers in the Linux kernel’s
networking implementation could set the addr_len value without initializing
the associated data structure. A local, unprivileged user could use this
flaw to leak kernel stack memory to user space using the recvmsg, recvfrom,
and recvmmsg system calls (CVE-2013-7263, CVE-2013-7265, Low).

Full details can be found here.

Updating the Kernel

You can either initiate a full yum update:

yum update

yum update "kernel-*"

As this update has just been released, your preferred CentOS yum mirror may not have the update yet. In this case. you may need to wait a few hours for the update to become available. Cached repo data can also prevent new updates from being found. To clear your yum cache, run:

yum clean all