CVE-2023-5088

Publication date 3 November 2023

Last updated 19 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.4 · Medium

Score breakdown

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

Package Ubuntu Release Status
qemu 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
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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 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)

Other references