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CVE-2021-4145

CVE-2021-4145

EPSS 0.4%CWE-476
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
n/a · QEMU

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References
https://bugzilla.redhat.com/show_bug.cgi?id=2034602https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cdhttps://security.gentoo.org/glsa/202208-27https://security.netapp.com/advisory/ntap-20220311-0004/