CVE-2023-42467

Publication date 11 September 2023

Last updated 26 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

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

Status

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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references