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CVE-2011-2512

5.8 · MEDIUM

The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbi…

Published Jun 21, 2012kvm_groupCWE-20EPSS 1.90%

Overview

CVE-2011-2512 is a medium-severity vulnerability affecting kvm_group qemu-kvm. It was published on June 21, 2012 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison.

Remediation

Check the references section for vendor advisories and patches from kvm_group. Update qemu-kvm 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
kvm_groupqemu-kvm0Affected

References

Refgit.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commitdiff%3Bh=7157e2e23e89adcd436caeab31fdd6b47eded377Reflists.opensuse.org/opensuse-security-announce/2011-07/msg00007.htmlRefrhn.redhat.com/errata/RHSA-2011-0919.htmlRefsecunia.com/advisories/44458Refsecunia.com/advisories/44648Refsecunia.com/advisories/45158Refsecunia.com/advisories/45170Refsecunia.com/advisories/45301Refubuntu.com/usn/usn-1165-1Refwww.openwall.com/lists/oss-security/2011/06/28/13

How CyberStrike helps

Frequently asked questions

What is CVE-2011-2512?

CVE-2011-2512 is a medium-severity vulnerability affecting kvm_group qemu-kvm. It was published on June 21, 2012 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2011-2512?

This vulnerability has a CVSS 2.0 base score of 5.8, 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-2011-2512?

Check the references section for vendor advisories and patches from kvm_group. Update qemu-kvm 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-2011-2512?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-2512 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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