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: 39.55%
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
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
oracular
ignored
plucky
ignored
questing
ignored
resolute
needs-triage
trusty
dne
xenial
needs-triage
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
oracular
Fixed 1:6.2+dfsg-2ubuntu5
released
plucky
Fixed 1:6.2+dfsg-2ubuntu5
released
questing
Fixed 1:6.2+dfsg-2ubuntu5
released
resolute
Fixed 1:6.2+dfsg-2ubuntu5
released
trusty
Fixed 2.0.0+dfsg-2ubuntu1.47+esm6
released
xenial
Fixed 1:2.5+dfsg-5ubuntu10.51+esm4
released
qemu-kvm
bionic
dne
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
trusty
dne
xenial
dne
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-audio-oss
suse enterprise server 12 SP5
3.1.1.1-63.4
fixed
qemu-audio-pa
suse enterprise sap 15 SP3
5.2.0-150300.109.2
fixed
suse enterprise server 12 SP5
3.1.1.1-63.4
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-audio-sdl
suse enterprise server 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
qemu-s390
suse enterprise server 12 SP5
3.1.1.1-63.4
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 12 SP5
63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
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-sdl
suse enterprise server 12 SP5
3.1.1.1-63.4
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 12 SP5
3.1.1.1-63.4
fixed
suse enterprise server 15 SP3
5.2.0-150300.109.2
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
ivshmem-tools
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-audio-alsa
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-audio-oss
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-audio-pa
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-audio-sdl
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-curl
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-dmg
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-iscsi
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-nfs
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-rbd
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-block-ssh
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-common
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-debuginfo
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-guest-agent
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-img
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-kvm
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-kvm-core
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-system-aarch64
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-system-aarch64-core
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-system-x86
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-system-x86-core
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-ui-curses
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-ui-gtk
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-ui-sdl
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-user
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-user-binfmt
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
fixed
qemu-user-static
Amazon Linux 2
10:3.1.0-8.amzn2.0.10
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