CVE-2021-4145
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Qemu
PublishedJan 25, 2022
First seenJan 25, 2022
Weakness typeCWE-476NULL pointer dereference
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qemu qemu | 6.1.0 | — |
| redhat enterprise_linux | 8.0 | — |
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