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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2021-4145
HistoryJan 25, 2022 - 8:15 p.m.

CVE-2021-4145

2022-01-2520:15:00
Debian Security Bug Tracker
security-tracker.debian.org
15

0.0004 Low

EPSS

Percentile

5.2%

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.