Use After Free Affecting qemu package, versions <1:6.1+dfsg-6


0.0
high

Snyk CVSS

    Attack Complexity High
    Privileges Required High
    Scope Changed
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.05% (13th percentile)
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NVD
7.5 high
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SUSE
6.7 medium
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN12-QEMU-1577278
  • published 31 Aug 2021
  • disclosed 23 Mar 2022

How to fix?

Upgrade Debian:12 qemu to version 1:6.1+dfsg-6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.