CVE-2021-4145

A NULL pointer dereference issue was found in the block mirror layer of QEMU. 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.

Releases of Red Hat OpenStack Platform 15 and newer, Red Hat Virtualization 4.4 and newer consume fixes directly from the Red Hat Enterprise Linux 8 Advanced Virtualization repository.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.