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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 0.06% (23rd percentile)
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NVD
6.5 medium
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SUSE
3.2 low
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Red Hat
3.2 low

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  • Snyk ID SNYK-DEBIAN12-QEMU-1558130
  • published 25 Jan 2021
  • disclosed 26 May 2021
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Introduced: 25 Jan 2021

CVE-2021-20196 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Debian:12 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:12 relevant fixed versions and status.

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.