cvedb.io
CVE-2021-4145
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2022-01-25T20:15:08.657 · Last modified 2026-06-17T04:19:06.790

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.

Affected products

qemu — qemu

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.