Debian: DSA-2443-1 Critical: Linux Kernel 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-2009-4307

Nageswara R Sastry reported an issue in the ext4 filesystem. Local users with the privileges to mount a filesystem can cause a denial of service
(BUG) by providing a s_log_groups_per_flex value greater than 31.

CVE-2011-1833

Vasiliy Kulikov of Openwall and Dan Rosenberg discovered an information
leak in the eCryptfs filesystem. Local users were able to mount arbitrary
directories.

CVE-2011-4347

Sasha Levin reported an issue in the device assignment functionality in
KVM. Local users with permission to access /dev/kvm could assign unused pci
devices to a guest and cause a denial of service (crash).

CVE-2012-0045

Stephan Barwolf reported an issue in KVM. Local users in a 32-bit guest
running on a 64-bit system can crash the guest with a s...