CVE Vulnerability

CVE-2021-4145

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.

4.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2 / Impact : 4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2034602 Issue Tracking Patch
https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20220311-0004/ Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qemu:qemu:6.1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:6.1.0:-:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:6.1.0:rc2:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:6.1.0:rc3:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:6.1.0:rc0:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
Information

Published : 2022-01-25 08:15

Updated : 2022-09-28 07:54

NVD link : CVE-2021-4145

Mitre link : CVE-2021-4145

Products Affected
No products.
CWE
CWE-476