VDB
DEBIAN-CVE-2021-4145
DEBIAN-CVE-2021-4145
PUBLISHED
CVSS 6.5 MEDIUM
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.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | qemu | 0, 0, 0 |
| Debian:14 | qemu | 0, 0, 0 |
| Debian:12 | qemu | 0, 0, 0 |
Timeline
- Jan 25, 2022 CVE Published
- Apr 28, 2026 CVE Updated