CVE-2023-42467 Denial of service in n/a

Medium 5.5 Published 11 Sep 2023 Updated 26 Sep 2024

An attacker can cause a denial of service in QEMU by triggering a division by zero error during SCSI disk reset operations.

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

What is CVE-2023-42467?

CVE-2023-42467 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 11 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-369

Which versions are affected by CVE-2023-42467?

It affects 1 product.

Linux distribution packages (2)

`qemu` SUSE:Linux Enterprise Micro 5.5	All versions	`7.1.0-150500.49.30.1`
`qemu` openSUSE:Tumbleweed	All versions	`8.1.2-1.1`

Products include Qemu Qemu.

How do I fix CVE-2023-42467?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-42467 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-42467 exists.

All Qemu Qemu vulnerabilities

Sources

Also known as AZL-35172, BELL-CVE-2023-42467, DEBIAN-CVE-2023-42467, GHSA-q76v-8f8c-4c2j, SUSE-SU-2025:0516-1, openSUSE-SU-2024:13364-1.