NULL Pointer Dereference Affecting qemu-kvm package, versions <10:3.1.0-8.amzn2.0.10


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.48% (39th percentile)

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  • Snyk IDSNYK-AMZN2-QEMUKVM-5663407
  • published1 Jun 2023
  • disclosed26 May 2021

Introduced: 26 May 2021

CVE-2021-20196  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 qemu-kvm to version 10:3.1.0-8.amzn2.0.10 or higher.
This issue was patched in ALAS2-2023-2061.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm package and not the qemu-kvm package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.

CVSS Base Scores

version 3.1