CVE-2020-27821
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- CVE-2020-27821
CVE Details
| Release Date: | 2020-12-08 |
Description
A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.
See more information about CVE-2020-27821 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 | Base Metrics: | AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | High | 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-2021-9285 | 2021-06-06 |
| Oracle Linux version 8 (hivex) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (hivex) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (netcf) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (netcf) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (seabios) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (seabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (supermin) | ELSA-2021-1762 | 2021-05-25 |
| Oracle Linux version 8 (supermin) | ELSA-2021-9568 | 2021-12-01 |
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