Ubuntu Security Notice 2613-1 - Vincent Tondellier discovered an integer overflow in the Linux kernel's netfilter connection tracking accounting of loaded extensions. An attacker on the local area network (LAN) could potential exploit this flaw to cause a denial of service (system crash of targeted system). Jan Beulich discovered the Xen virtual machine subsystem of the Linux kernel did not properly restrict access to PCI command registers. A local guest user could exploit this flaw to cause a denial of service (host crash). Various other issues were also addressed.
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