CVE-2009-3722

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.

Category

7.1
CVSS
Severity: High
CVSS 2.0 •
EPSS 2.48% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory mandriva.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9892 vdb entry signature
http://marc.info/?l=oss-security&m=125678631403558&w=2 mailing list
http://www.ubuntu.com/usn/usn-864-1 vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2010:198 vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=531660
http://www.redhat.com/support/errata/RHSA-2010-0126.html vendor advisory
http://marc.info/?l=oss-security&m=125680666827148&w=2 mailing list
http://www.securityfocus.com/bid/37221 vdb entry
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/testing/ChangeLog-2.6.32-rc1 vendor advisory
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.1 vendor advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0a79b009525b160081d75cef5dbf45817956acf2

Frequently Asked Questions

What is the severity of CVE-2009-3722?
CVE-2009-3722 has been scored as a high severity vulnerability.
How to fix CVE-2009-3722?
To fix CVE-2009-3722, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-3722 being actively exploited in the wild?
It is possible that CVE-2009-3722 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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