Debian: DSA-2632-1 Critical: Linux-2.6 Privilege Escalation and DoS

Several vulnerabilities have been discovered in the Linux kernel that may lead
to a denial of service or privilege escalation. The Common Vulnerabilities and
Exposures project identifies the following problems:

CVE-2013-0231

Jan Beulich provided a fix for an issue in the Xen PCI backend drivers.
Users of guests on a system using passed-through PCI devices can create
a denial of service of the host system due to the use of non-ratelimited
kernel log messages.

CVE-2013-0871

Suleiman Souhlal and Salman Qazi of Google, with help from Aaron Durbin
and Michael Davidson of Google, discovered an issue in the
ptrace subsystem. Due to a race condition with PTRACE_SETREGS, local users can cause kernel stack corruption and execution of arbitrary code.

For the stable distribution (squeeze), this problem has been fixed in version
2.6.32-48squeeze1.

The following matrix lists additional source packages that were rebuilt for
compatibility with or to take advantage of this update:

...