CVE-2021-4145: Qemu
Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.
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.
Affected products
Published 2022-01-25. Last modified 2026-06-17.