# CVE-2022-23033: Other in xen

> A flaw in Xen's Arm p2m mapping removal allows guests to retain access to freed memory pages, potentially leading to data leakage or privilege escalation.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 25 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** ALPINE-CVE-2022-23033, DEBIAN-CVE-2022-23033, GHSA-74f6-jp2h-2vw3, UBUNTU-CVE-2022-23033

## What is CVE-2022-23033?

CVE-2022-23033 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2022-23033?

It affects 3 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Xen Xen.

## How do I fix CVE-2022-23033?

Apply the vendor's patch.

## Is CVE-2022-23033 being exploited?

There is no known exploitation of CVE-2022-23033 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-23033 and fix it if it is affected.

What it is: CVE-2022-23033 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jan 2022. 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-2022-23033 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2022-23033/ (Markdown: https://insights.sbomify.com/CVE-2022-23033/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-23033
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-23033
- OSV: https://osv.dev/vulnerability/CVE-2022-23033

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-23033/
Summaries are generated and may contain mistakes; the official description above is the record.