CVE-2021-20196

2021-05-2600:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

22.2%

JSON

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.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchqemu< 1:2.11+dfsg-1ubuntu7.39UNKNOWN
ubuntu20.04noarchqemu< 1:4.2-3ubuntu6.21UNKNOWN
ubuntu21.10noarchqemu< 1:6.0+dfsg-2expubuntu1.2UNKNOWN
ubuntu22.04noarchqemu< 1:6.2+dfsg-2ubuntu5UNKNOWN
ubuntu22.10noarchqemu< 1:6.2+dfsg-2ubuntu5UNKNOWN
ubuntu23.04noarchqemu< 1:6.2+dfsg-2ubuntu5UNKNOWN
ubuntu23.10noarchqemu< 1:6.2+dfsg-2ubuntu5UNKNOWN
ubuntu14.04noarchqemu< anyUNKNOWN
ubuntu16.04noarchqemu< anyUNKNOWN
ubuntu18.04noarchxen< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	qemu	< 1:2.11+dfsg-1ubuntu7.39	UNKNOWN
ubuntu	20.04	noarch	qemu	< 1:4.2-3ubuntu6.21	UNKNOWN
ubuntu	21.10	noarch	qemu	< 1:6.0+dfsg-2expubuntu1.2	UNKNOWN
ubuntu	22.04	noarch	qemu	< 1:6.2+dfsg-2ubuntu5	UNKNOWN
ubuntu	22.10	noarch	qemu	< 1:6.2+dfsg-2ubuntu5	UNKNOWN
ubuntu	23.04	noarch	qemu	< 1:6.2+dfsg-2ubuntu5	UNKNOWN
ubuntu	23.10	noarch	qemu	< 1:6.2+dfsg-2ubuntu5	UNKNOWN
ubuntu	14.04	noarch	qemu	< any	UNKNOWN
ubuntu	16.04	noarch	qemu	< any	UNKNOWN
ubuntu	18.04	noarch	xen	< any	UNKNOWN