kernel: two vulnerabilities

From the Red Hat bugzilla entries [1, 2]:

CVE-2013-4254: Linux kernel built for the ARM(CONFIG_ARM/CONFIG_ARM64) platforms along with the hardware performance counter support(CONFIG_HW_PERF_EVENTS) is vulnerable to a NULL pointer dereference flaw. This could lead to the kernel crash resulting in DoS or potential privilege escalation to gain root privileges by a non-root user.

An unprivileged user/program could use this flaw to crash the kernel resulting in DoS or potential privilege escalation to gain root access to a machine.

CVE-2013-0343: Due to the way the Linux kernel handles the creation of IPv6 temporary addresses a malicious LAN user can remotely disable them altogether which may lead to privacy violations and information disclosure.

Reference:
http://seclists.org/oss-sec/2012/q4/292
http://seclists.org/oss-sec/2013/q1/92