CVE-2021-4145
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- CVE-2021-4145
CVE Details
| Release Date: | 2022-01-25 |
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.
See more information about CVE-2021-4145 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 6.5 | Base Metrics: | AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Changed | Confidentiality Impact: | None |
| Integrity Impact: | None | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (qemu) | ELSA-2022-9344 | 2022-04-29 |
| Oracle Linux version 8 (hivex) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (hivex) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libguestfs) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libguestfs) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libiscsi) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libiscsi) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libnbd) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libnbd) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libtpms) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libvirt) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libvirt) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (nbdkit) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (nbdkit) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (netcf) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (netcf) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (seabios) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (seabios) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (sgabios) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (sgabios) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (supermin) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (supermin) | ELSA-2022-9364 | 2022-05-09 |
| Oracle Linux version 8 (swtpm) | ELSA-2022-1759 | 2022-05-17 |
| Oracle Linux version 8 (virt-v2v) | ELSA-2022-1759 | 2022-05-17 |
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