What is CVE-2009-2287?

CVE-2009-2287 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2009-2287 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2009-2287?

CVE-2009-2287 has a CVSS score of 4.9 out of 10, rated Medium severity. The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2009-2287?

No patch is currently available for CVE-2009-2287. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2009-2287 actively exploited?

CVE-2009-2287 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2009-2287

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 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.

Package Linux Kernel

Published 2009-07-01

Last modified 2026-04-23

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

4.9

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

AV:L/AC:L/Au:N/C:N/I:N/A:C

Weakness type

CWE-476

CVE-2009-2287 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2009-2287 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Secunia
http://secunia.com/advisories/35675

Broken Link
Secunia
http://secunia.com/advisories/36045

Broken Link
Secunia
http://secunia.com/advisories/36054

Broken Link
Sourceforge
http://sourceforge.net/tracker/?func=detail&atid=893831&aid=2687641&group_id=180599

Third Party Advisory
Debian Security
http://www.debian.org/security/2009/dsa-1845

Third Party Advisory
Mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2010:198

Broken Link
Ubuntu Security
http://www.ubuntu.com/usn/usn-807-1

Third Party Advisory
Kernel patch commit
http://git.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=e7c45b24f298b5d9efd7d401150f64a1b51aaac4
Patch
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=59839dfff5eabca01cc4e20b45797a60a80af8cb
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2009/06/30/1
Patch

Details

CVE ID CVE-2009-2287

Severity Medium

CVSS score 4.9 / 10

CVSS version 2.0

Published 2009-07-01

Modified 2026-04-23

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2009-2287?

CVE-2009-2287 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2009-2287 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2009-2287?

CVE-2009-2287 has a CVSS score of 4.9 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2009-2287?

No patch is currently available for CVE-2009-2287. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2009-2287 actively exploited?

No — CVE-2009-2287 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →