---
title: "CVE-2023-42467\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-42467?format=md
keywords: index, follow
---

# CVE-2023-42467

Publication date 11 September 2023

Last updated 26 August 2025

---

Ubuntu priority

**Low**

[Why this priority?](https://ubuntu.com/security/CVE-2023-42467?format=md#priority-reason )

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2023-42467?format=md#impact-score)

Toggle side navigation

## Description

QEMU through 8.0.0 could trigger a division by zero in scsi\_disk\_reset in
hw/scsi/scsi-disk.c because scsi\_disk\_emulate\_mode\_select does not prevent
s->qdev.blocksize from being 256. This stops QEMU and the guest
immediately.

### Why is this CVE low priority?

Privileged guest user can crash own VM only

[Learn more about Ubuntu priority](https://ubuntu.com/security/cves/about#priority)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qemu | 24.10 oracular | Fixed 1:8.1.3+ds-1ubuntu1 |
| 24.04 LTS noble | Fixed 1:8.1.3+ds-1ubuntu1 |
| 23.10 mantic | Fixed 1:8.0.4+dfsg-1ubuntu3.23.10.2 |
| 23.04 lunar | Fixed 1:7.2+dfsg-5ubuntu2.4 |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2023-42467?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| qemu | * Upstream:   [7cfcc79](https://gitlab.com/qemu-project/qemu/-/commit/7cfcc79b0ab800959716738aff9419f53fc68c9c) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42467)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-42467)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-42467)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-42467)

### Related Ubuntu Security Notices (USN)

+ [USN-6567-1](https://usn.ubuntu.com/USN-6567-1)
+ QEMU vulnerabilities
+ 8 January 2024

### Other references

* <https://gitlab.com/thuth/qemu/-/commit/3f91104484e5bf55b56d7e1b039a4a5a17d0c1a7>
* <https://www.cve.org/CVERecord?id=CVE-2023-42467>