Bug 277375 (CVE-2009-2287)

Summary:	Kernel: kvm_arch_vcpu_ioctl_set_sregs NULL pointer dereference (CVE-2009-2287)
Product:	Gentoo Security	Reporter:	Stefan Behte (RETIRED) <craig>
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/stable/linux-2.6.30.y.git;a=commit;h=d42a5ebb5ecc66aa692a1141c7ba284ec612e9cc
Whiteboard:	[linux <2.6.30]
Package list:		Runtime testing required:	---

Description Stefan Behte (RETIRED) gentoo-dev

2009-07-10 23:19:56 UTC

CVE-2009-2287 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2287):
  The kvm_arch_vcpu_ioctl_set_sregs function in the KVM in Linux kernel
  2.6 before 2.6.30, when running on x86 systems, does not validate the
  page table root in a KVM_SET_SREGS call, which allows local users to
  cause a denial of service (crash or hang) via a crafted cr3 value,
  which triggers a NULL pointer dereference in the gfn_to_rmap function.

Comment 1 dacook 2009-07-17 17:22:00 UTC

According to the summary and upstream bug, it only affects <=kvm-84.