CVE-2021-20257
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- CVE-2021-20257
CVE Details
| Release Date: | 2022-03-16 |
Description
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
See more information about CVE-2021-20257 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-2021-9335 | 2021-06-28 |
| Oracle Linux version 7 (qemu) | ELSA-2021-9638 | 2022-01-04 |
| Oracle Linux version 8 (hivex) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (hivex) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (hivex) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libiscsi) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libnbd) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (nbdkit) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (netcf) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (netcf) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (netcf) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (seabios) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (seabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (seabios) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (sgabios) | ELSA-2022-9172 | 2022-02-25 |
| Oracle Linux version 8 (supermin) | ELSA-2021-5238 | 2021-12-22 |
| Oracle Linux version 8 (supermin) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (supermin) | ELSA-2022-9172 | 2022-02-25 |
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