NULL Pointer Dereference Affecting qemu package, versions <1:6.2+dfsg-1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
6.5 medium
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Red Hat
5.6 medium

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  • Snyk ID SNYK-DEBIANUNSTABLE-QEMU-2324963
  • published 23 Dec 2021
  • disclosed 25 Jan 2022

How to fix?

Upgrade Debian:unstable qemu to version 1:6.2+dfsg-1 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:unstable relevant fixed versions and status.

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The self pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.