NULL Pointer Dereference Affecting qemu-kvm-hw-usbredir package, versions <15:6.2.0-11.module+el8.6.0+1000+18e3b59f.5


Severity

Recommended
0.0
medium
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.48% (39th percentile)

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  • Snyk IDSNYK-ROCKY8-QEMUKVMHWUSBREDIR-3199844
  • published5 Jan 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 Rocky-Linux:8 qemu-kvm-hw-usbredir to version 15:6.2.0-11.module+el8.6.0+1000+18e3b59f.5 or higher.
This issue was patched in RLSA-2022:1759.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-hw-usbredir package and not the qemu-kvm-hw-usbredir package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 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