# CVE-2024-45819: libxl leaks data to PVH guests via ACPI tables

> A local attacker with PVH guest access can read uninitialized memory from the host via ACPI tables, potentially exposing sensitive data.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Dec 2024
- **Updated:** 31 Dec 2024
- **Also known as:** ALPINE-CVE-2024-45819, DEBIAN-CVE-2024-45819, GHSA-4rgq-6973-6xxh, UBUNTU-CVE-2024-45819

## What is CVE-2024-45819?

CVE-2024-45819 is a medium-severity vulnerability in Xen Xen, published on 19 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

PVH guests have their ACPI tables constructed by the toolstack.  The
construction involves building the tables in local memory, which are
then copied into guest memory.  While actually used parts of the local
memory are filled in correctly, excess space that is being allocated is
left with its prior contents.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2024-45819?

It affects 1 product.


Products: Xen Xen.

## How do I fix CVE-2024-45819?

Apply the vendor's patch.

## Is CVE-2024-45819 being exploited?

There is no known exploitation of CVE-2024-45819 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-2024-45819 and fix it if it is affected.

What it is: CVE-2024-45819 is a medium-severity vulnerability in Xen Xen, published on 19 Dec 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-2024-45819 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-2024-45819/ (Markdown: https://insights.sbomify.com/CVE-2024-45819/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-45819
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-45819
- OSV: https://osv.dev/vulnerability/CVE-2024-45819

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-45819/
Summaries are generated and may contain mistakes; the official description above is the record.