Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 2.6.31 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://marc.info/?l=oss-security&m=125626965020571&w=2
- http://marc.info/?l=oss-security&m=125640417219385&w=2
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1Vendor Advisory
- http://www.securityfocus.com/bid/36805
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53947
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://marc.info/?l=oss-security&m=125626965020571&w=2
- http://marc.info/?l=oss-security&m=125640417219385&w=2
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1Vendor Advisory
- http://www.securityfocus.com/bid/36805
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53947
FAQ
What is CVE-2009-3640?
CVE-2009-3640 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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...
How severe is CVE-2009-3640?
CVE-2009-3640 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-3640?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.