CVE-2023-5088

Publication date 3 November 2023

Last updated 19 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A bug in QEMU could cause a guest I/O operation otherwise addressed to an arbitrary disk offset to be targeted to offset 0 instead (potentially overwriting the VM's boot code). This could be used, for example, by L2 guests with a virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1) hypervisor to read and/or write data to LBA 0 of vdiskL1, potentially gaining control of L1 at its next reboot.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	26.04 LTS resolute	Fixed 1:8.1.3+ds-1ubuntu1
	25.10 questing	Fixed 1:8.1.3+ds-1ubuntu1
	25.04 plucky	Fixed 1:8.1.3+ds-1ubuntu1
	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	Fixed 1:6.2+dfsg-2ubuntu6.16
	20.04 LTS focal	Fixed 1:4.2-3ubuntu6.28
	18.04 LTS bionic	Ignored end of standard support
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Patch details

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

Package	Patch details
qemu	Upstream: 7d75120

Severity score breakdown

Parameter	Value
Base score	6.4 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-6567-1
QEMU vulnerabilities
8 January 2024