NULL Pointer Dereference Affecting virt:av/libvirt-daemon-driver-storage-iscsi package, versions <0:7.6.0-6.module+el8.5.0+13051+7ddbe958


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.06% (26th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4433861
  • published26 Jul 2021
  • disclosed23 Jan 2021

Introduced: 23 Jan 2021

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

How to fix?

Upgrade RHEL:8 virt:av/libvirt-daemon-driver-storage-iscsi to version 0:7.6.0-6.module+el8.5.0+13051+7ddbe958 or higher.
This issue was patched in RHSA-2022:0397.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:av/libvirt-daemon-driver-storage-iscsi package and not the virt:av/libvirt-daemon-driver-storage-iscsi package as distributed by RHEL. See How to fix? for RHEL: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 Scores

version 3.1