Bug 291356 (CVE-2009-3640)

Summary:	Kernel: update_cr8_intercept() DoS/PrivEsc (CVE-2009-3640)
Product:	Gentoo Security	Reporter:	Alex Legler (RETIRED) <a3li>
Component:	Kernel	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	hardened-kernel+disabled, kernel
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=88c808fd42b53a7e01a2ac3253ef31fef74cb5af
Whiteboard:	[linux <2.6.31.2] [gp <2.6.31-3]
Package list:		Runtime testing required:	---

Description Alex Legler (RETIRED) archtester

2009-10-31 19:16:51 UTC

CVE-2009-3640 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3640):
  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.