# CVE-2024-31146: PCI device pass-through with shared resources

> Xen hypervisor lacks explicit security support for PCI device pass-through with shared resources, requiring configuration changes to mitigate risks.

- **Severity:** High 7.5 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Sep 2024
- **Updated:** 25 Sep 2024
- **Also known as:** DEBIAN-CVE-2024-31146, GHSA-hrw6-9556-27w2, UBUNTU-CVE-2024-31146

## What is CVE-2024-31146?

CVE-2024-31146 is a high-severity vulnerability in Xen Xen, published on 25 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

When multiple devices share resources and one of them is to be passed
through to a guest, security of the entire system and of respective
guests individually cannot really be guaranteed without knowing
internals of any of the involved guests.  Therefore such a configuration
cannot really be security-supported, yet making that explicit was so far
missing.

Resources the sharing of which is known to be problematic include, but
are not limited to
- - PCI Base Address Registers (BARs) of multiple devices mapping to the
  same page (4k on x86),
- - INTx lines.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2024-31146?

It affects 1 product.


Products: Xen Xen.

## How do I fix CVE-2024-31146?

Change a configuration setting.

## Is CVE-2024-31146 being exploited?

There is no known exploitation of CVE-2024-31146 in the wild and no public exploit code.

## Other vulnerabilities in Xen Xen

- [CVE-2017-10912](https://insights.sbomify.com/CVE-2017-10912/): Privilege escalation in n/a (critical 10.0)
- [CVE-2017-10918](https://insights.sbomify.com/CVE-2017-10918/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-10920](https://insights.sbomify.com/CVE-2017-10920/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-10921](https://insights.sbomify.com/CVE-2017-10921/): Memory corruption in n/a (critical 10.0)
- [CVE-2025-27466](https://insights.sbomify.com/CVE-2025-27466/): Mutiple vulnerabilities in the Viridian interface (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-31146 and fix it if it is affected.

What it is: CVE-2024-31146 is a high-severity vulnerability in Xen Xen, published on 25 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-31146 in the wild and no public exploit code.

Affected product: Xen Xen. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-31146/ (Markdown: https://insights.sbomify.com/CVE-2024-31146/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-31146
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-31146
- OSV: https://osv.dev/vulnerability/CVE-2024-31146

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-31146/
Summaries are generated and may contain mistakes; the official description above is the record.