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CVE-2021-20196

Published: 26 May 2021

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.

Priority

Low

CVSS 3 base score: 6.5

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic
Released (1:2.11+dfsg-1ubuntu7.39)
focal
Released (1:4.2-3ubuntu6.21)
groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish
Released (1:6.0+dfsg-2expubuntu1.2)
jammy
Released (1:6.2+dfsg-2ubuntu5)
precise Does not exist

trusty Needed

upstream Needs triage

xenial Needed

qemu-kvm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Ignored
(end of ESM support, was deferred [2021-11-17])
trusty Does not exist

upstream Needs triage

xenial Does not exist

xen
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Needs triage

jammy Needs triage

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage