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CVE-2009-2287

4.9 · MEDIUM

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 loc…

Published Jul 1, 2009linuxCWE-476EPSS 0.40%

Overview

CVE-2009-2287 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 1, 2009 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 2.6.0, < 2.6.30Affected

References

Refgit.kernel.org/?p=linux/kernel/git/stable/stable-queue.git%3Ba=blob%3Bf=queue-2.6.30/kvm-x86-check-for-cr3-validity-in-ioctl_set_sregs.patch%3Bh=b48a47dad2cf76358b327368f80c0805e6370c68%3Bhb=e7c45b24f298b5d9efd7d401150f64a1b51aaac4Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=59839dfff5eabca01cc4e20b45797a60a80af8cbRefsecunia.com/advisories/35675Refsecunia.com/advisories/36045Refsecunia.com/advisories/36054Refsourceforge.net/tracker/?func=detail&atid=893831&aid=2687641&group_id=180599Refwww.debian.org/security/2009/dsa-1845Refwww.mandriva.com/security/advisories?name=MDVSA-2010:198Refwww.openwall.com/lists/oss-security/2009/06/30/1Refwww.ubuntu.com/usn/usn-807-1

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2287?

CVE-2009-2287 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 1, 2009 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

How severe is CVE-2009-2287?

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-2287?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-2287?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2287 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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