Vulnerabilities > CVE-2021-4145 - NULL Pointer Dereference vulnerability in multiple products

047910
CVSS 6.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
local
low complexity
qemu
redhat
CWE-476
NVD
Published: 2022-01-25
Updated: 2024-11-21

Summary

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.

Vulnerable Configurations

Part Description Count
Application
Qemu
6
OS
Redhat
1

Common Weakness Enumeration (CWE)

References