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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2970-1 qemu security update
Debian DLA Debian DLA DLA-3099-1 qemu security update
Debian DSA Debian DSA DSA-4980-1 qemu security update
EUVD EUVD EUVD-2021-27024 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.
Ubuntu USN Ubuntu USN USN-5307-1 QEMU vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:09:08.293Z

Reserved: 2021-08-30T00:00:00

Link: CVE-2021-3748

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-03-23T20:15:09.893

Modified: 2024-11-21T06:22:19.667

Link: CVE-2021-3748

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-08-27T00:00:00Z

Links: CVE-2021-3748 - Bugzilla

cve-icon OpenCVE Enrichment

No data.