USN-1389-1: Linux kernel vulnerabilities

Paolo Bonzini discovered a flaw in Linux's handling of the SGIO ioctl command. A local user, or user in a VM could exploit this flaw to bypass restrictions and gain read/write access to all data on the affected block device. CVE-2011-4127 A flaw was found in KVM's Programmable Interval Timer PIT...

kernel: kvm: pit timer with no irqchip crashes the system

The createpittimer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer PIT interrupt requests IRQs when a virtual interrupt controller irqchip is not available, which allows local users to cause a denial of service NUL...

USN-1384-1: Linux kernel (Oneiric backport) vulnerabilities

A bug was discovered in the Linux kernel's calculation of OOM Out of memory scores, that would result in the wrong process being killed. A user could use this to kill the process with the highest OOM score, even if that process belongs to another user or the system. CVE-2011-4097 Paolo Bonzini...

UBUNTU-CVE-2011-4622

The createpittimer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer PIT interrupt requests IRQs when a virtual interrupt controller irqchip is not available, which allows local users to cause a denial of service NUL...

Design/Logic Flaw

The pitioportread function in the Programmable Interval Timer PIT emulation in i8254.c in KVM 83 does not properly use the pitstate data structure, which allows guest OS users to cause a denial of service host OS crash or hang by attempting to read the /dev/port file...

Important: Red Hat Security Advisory: rhev-hypervisor security and bug fix update

An updated rhev-hypervisor package that fixes security issues and several bugs is now available. This update has been rated as having important security impact by the Red Hat Security Response Team. The rhev-hypervisor package provides a Red Hat Enterprise Virtualization RHEV Hypervisor ISO disk...