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CVE-2023-5088

Published: 3 November 2023

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.

Priority

Medium

Cvss 3 Severity Score

7.0

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic Needs triage

focal
Released (1:4.2-3ubuntu6.28)
jammy
Released (1:6.2+dfsg-2ubuntu6.16)
lunar
Released (1:7.2+dfsg-5ubuntu2.4)
mantic
Released (1:8.0.4+dfsg-1ubuntu3.23.10.2)
trusty Needs triage

upstream Needs triage

xenial Needs triage

Patches:
upstream: https://gitlab.com/qemu-project/qemu/-/commit/7d7512019fc40c577e2bdd61f114f31a9eb84a8e

Severity score breakdown

Parameter Value
Base score 7.0
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H