CVE-2021-3748

CVE Details

Release Date:2022-03-23

Description


A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

See more information about CVE-2021-3748 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: 8.8 Base Metrics: AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Access Vector: Local network Attack Complexity: Low
Privileges Required: Low User Interaction: None
Scope: Changed Confidentiality Impact: High
Integrity Impact: High Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 7 (olcne)ELSA-2022-94912022-06-16
Oracle Linux version 7 (olcne)ELSA-2022-94922022-06-16
Oracle Linux version 7 (qemu)ELSA-2022-94322022-05-26
Oracle Linux version 8 (hivex)ELSA-2022-17592022-05-17
Oracle Linux version 8 (hivex)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libguestfs)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libguestfs)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libguestfs-winsupport)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libguestfs-winsupport)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libiscsi)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libiscsi)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libnbd)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libnbd)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libtpms)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libvirt)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libvirt)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libvirt-dbus)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libvirt-dbus)ELSA-2022-94602022-06-06
Oracle Linux version 8 (libvirt-python)ELSA-2022-17592022-05-17
Oracle Linux version 8 (libvirt-python)ELSA-2022-94602022-06-06
Oracle Linux version 8 (nbdkit)ELSA-2022-17592022-05-17
Oracle Linux version 8 (nbdkit)ELSA-2022-94602022-06-06
Oracle Linux version 8 (netcf)ELSA-2022-17592022-05-17
Oracle Linux version 8 (netcf)ELSA-2022-94602022-06-06
Oracle Linux version 8 (olcne)ELSA-2022-94932022-06-16
Oracle Linux version 8 (olcne)ELSA-2022-94942022-06-17
Oracle Linux version 8 (perl-Sys-Virt)ELSA-2022-17592022-05-17
Oracle Linux version 8 (perl-Sys-Virt)ELSA-2022-94602022-06-06
Oracle Linux version 8 (qemu-kvm)ELSA-2022-17592022-05-17
Oracle Linux version 8 (qemu-kvm)ELSA-2022-94602022-06-06
Oracle Linux version 8 (seabios)ELSA-2022-17592022-05-17
Oracle Linux version 8 (seabios)ELSA-2022-94602022-06-06
Oracle Linux version 8 (sgabios)ELSA-2022-17592022-05-17
Oracle Linux version 8 (sgabios)ELSA-2022-94602022-06-06
Oracle Linux version 8 (supermin)ELSA-2022-17592022-05-17
Oracle Linux version 8 (supermin)ELSA-2022-94602022-06-06
Oracle Linux version 8 (swtpm)ELSA-2022-17592022-05-17
Oracle Linux version 8 (virt-v2v)ELSA-2022-17592022-05-17



This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team

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