CVE-2009-3640 Information

Description

The update_cr8_intercept function in arch/x86/kvm/x86.c in the KVM subsystem in the Linux kernel before 2.6.32-rc1 does not properly handle the absence of an Advanced Programmable Interrupt Controller (APIC) which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly gain privileges via a call to the kvm_vcpu_ioctl function.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=88c808fd42b53a7e01a2ac3253ef31fef74cb5af http://marc.info/?l=oss-security&m=125626965020571&w=2 http://marc.info/?l=oss-security&m=125640417219385&w=2 http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1 http://www.securityfocus.com/bid/36805 https://exchange.xforce.ibmcloud.com/vulnerabilities/53947