CVE-2009-3722

Linux Kernel < 2.6.31 - Access Control

Title source: rule

Description

The handle_dr function in arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 2.6.31.1 does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service (trap) on the host OS via a crafted application.

References (12)

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0a79b009525b160081d75cef5dbf45817956acf2

[Mailing List] http://marc.info/?l=oss-security&m=125678631403558&w=2

[Mailing List] http://marc.info/?l=oss-security&m=125680666827148&w=2

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.9

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.1

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1

[Vendor Advisory] http://www.mandriva.com/security/advisories?name=MDVSA-2010:198

[Vendor Advisory] http://www.redhat.com/support/errata/RHSA-2010-0126.html

[Vendor Advisory] http://www.ubuntu.com/usn/usn-864-1

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=531660

[Third Party Advisory, VDB Entry] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9892

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/37221

Scores

EPSS 0.0260

EPSS Percentile 85.4%

Classification

CWE

CWE-264

Status draft

Affected Products (50)

linux/linux_kernel < 2.6.31

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

... and 35 more

Timeline

Published Oct 30, 2009

Tracked Since Feb 18, 2026