Improper Synchronization Affecting qemu-kvm-device-display-virtio-vga package, versions <17:8.2.0-11.el9_4


Severity

Recommended
medium

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-ALMALINUX9-QEMUKVMDEVICEDISPLAYVIRTIOVGA-6811350
  • published 7 May 2024
  • disclosed 30 Apr 2024

How to fix?

Upgrade AlmaLinux:9 qemu-kvm-device-display-virtio-vga to version 17:8.2.0-11.el9_4 or higher.
This issue was patched in ALSA-2024:2135.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-device-display-virtio-vga package and not the qemu-kvm-device-display-virtio-vga package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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.

CVSS Scores

version 3.1
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NVD

7 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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Red Hat

6.4 medium