CVE-2023-5088 MEDIUM

CVE-2023-5088: Qemu: improper ide controller reset can lead to mbr overwrite

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-821
Published November 3, 2023
Last update February 25, 2026
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 3, 2023 CVE published
February 25, 2026 Record updated