CVE-2021-4145

2022-01-2500:00:00

ubuntu.com

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

6.5

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

EPSS

Percentile

5.1%

JSON

A NULL pointer dereference issue was found in the block mirror layer of
QEMU in versions prior to 6.2.0. The self pointer is dereferenced in
mirror_wait_on_conflicts() without ensuring that it’s not NULL. A malicious
unprivileged user within the guest could use this flaw to crash the QEMU
process on the host when writing data reaches the threshold of mirroring
node.