kvm (SL5)

Synopsis: Low: kvm security and bug fix update
Issue Date: 2011-01-13
CVE Numbers: CVE-2010-4525

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for
the standard Red Hat Enterprise Linux kernel.

A data structure field in kvm_vcpu_ioctl_x86_get_vcpu_events() in QEMU-KVM
was not initialized properly before being copied to user-space. A
privileged host user with access to “/dev/kvm” could use this flaw to leak
kernel stack memory to user-space. (CVE-2010-4525)

Red Hat would like to thank Stephan Mueller of atsec information security
for reporting this issue.

These updated packages also fix several bugs. Documentation for these bug
fixes will be available shortly in the “kvm” section of the Red Hat
Enterprise Linux 5.6 Technical Notes, linked to in the References.

All KVM users should upgrade to these updated packages, which resolve this
issue as well as fixing the bugs noted in the Technical Notes. Note: The
procedure in the Solution section must be performed before this update will
take effect.


– Scientific Linux Development Team