CVE-2021-20196

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 11%
Affected Products (NVD)
VendorProductVersion
qemuqemu
5.2.0
debiandebian_linux
9.0
debiandebian_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
qemu
bookworm
1:7.2+dfsg-7+deb12u7
fixed
bullseye
1:5.2+dfsg-11+deb11u3
fixed
bullseye (security)
vulnerable
sid
1:9.1.1+ds-2
fixed
trixie
1:9.1.1+ds-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
qemu
bionic
Fixed 1:2.11+dfsg-1ubuntu7.39
released
focal
Fixed 1:4.2-3ubuntu6.21
released
groovy
ignored
hirsute
ignored
impish
Fixed 1:6.0+dfsg-2expubuntu1.2
released
jammy
Fixed 1:6.2+dfsg-2ubuntu5
released
kinetic
Fixed 1:6.2+dfsg-2ubuntu5
released
lunar
Fixed 1:6.2+dfsg-2ubuntu5
released
mantic
Fixed 1:6.2+dfsg-2ubuntu5
released
noble
Fixed 1:6.2+dfsg-2ubuntu5
released
trusty
needed
xenial
needed
qemu-kvm
bionic
dne
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
trusty
dne
xenial
dne
xen
bionic
needs-triage
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
trusty
dne
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
qemu
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-arm
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-audio-alsa
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-audio-pa
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-audio-spice
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-block-curl
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-block-iscsi
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-block-rbd
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-block-ssh
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-chardev-baum
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-chardev-spice
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-guest-agent
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-display-qxl
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-display-virtio-gpu
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-display-virtio-gpu-pci
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-display-virtio-vga
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-s390x-virtio-gpu-ccw
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-hw-usb-redirect
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ksm
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-kvm
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-lang
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ppc
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-s390x
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-sgabios-8
suse enterprise sap 15 SP3
150300.109.2
fixed
suse enterprise server 12 SP3
43.68.1
fixed
suse enterprise server 15 SP3
150300.109.2
fixed
qemu-skiboot
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-tools
suse enterprise desktop 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ui-curses
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ui-gtk
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ui-opengl
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ui-spice-app
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-ui-spice-core
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-x86
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP3
2.9.1-43.68.1
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
Common Weakness Enumeration
References
https://bugs.launchpad.net/qemu/+bug/1912780
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://security.netapp.com/advisory/ntap-20210708-0004/
https://www.openwall.com/lists/oss-security/2021/01/28/1
https://bugs.launchpad.net/qemu/+bug/1912780
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://security.netapp.com/advisory/ntap-20210708-0004/
https://www.openwall.com/lists/oss-security/2021/01/28/1