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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2022-03-23T19:46:40

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 : Analyzed

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

Modified: 2023-01-03T15:16:38.483

Link: CVE-2021-3748

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2021-3748 - Bugzilla