CVE-2009-2287: Canonical Ubuntu Linux

Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 8.04 only; version 8.10 only; version 9.04 only
• Debian Debian Linux: version 4.0 only; version 5.0 only
• Linux Linux Kernel: from 2.6.0, before 2.6.30 (fixed in 2.6.30)

Published 2009-07-01. Last modified 2026-06-16.