CVE-2023-42467: Divide by Zero

Published Sep 11, 2023
·
Updated

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

Affected Software

5 affected componentsFixes available
ubuntu/qemu<1:7.2+dfsg-5ubuntu2.4
1:7.2+dfsg-5ubuntu2.4
ubuntu/qemu<1:8.0.4+dfsg-1ubuntu3.23.10.2
1:8.0.4+dfsg-1ubuntu3.23.10.2
ubuntu/qemu<1:8.1.3+
1:8.1.3+
debian/qemu
1:5.2+dfsg-11+deb11u31:5.2+dfsg-11+deb11u21:7.2+dfsg-7+deb12u71:9.0.2+ds-21:9.1.0+ds-3
Qemu Qemu<=8.0.0

Remediation

Patch Available

https://gitlab.com/qemu-project/qemu/-/commit/7cfcc79b0ab800959716738aff9419f53fc68c9c

Event History

Sep 11, 2023
CVE Published
12:00 AM
Data Sourced
12:00 AM
Description
Data Sourced
via Red Hat·09:15 AM
DescriptionSeverityAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·08:48 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is CVE-2023-42467?

CVE-2023-42467 is a vulnerability in QEMU versions up to 8.0.0 that could trigger a division by zero, leading to a denial of service (DoS) condition.

2

How does CVE-2023-42467 impact QEMU?

CVE-2023-42467 can be exploited to cause QEMU to crash, resulting in the immediate termination of the QEMU process and the guest system.

3

What is the severity of CVE-2023-42467?

CVE-2023-42467 has a medium severity rating, with a CVSS score of 5.5.

4

How can I mitigate CVE-2023-42467?

To mitigate CVE-2023-42467, you should update your QEMU installation to a version that is not affected by this vulnerability.

5

Where can I find more information about CVE-2023-42467?

You can find more information about CVE-2023-42467 at the official GitLab page for QEMU and the associated commit.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203