Vulnerability Database

289,599

Total vulnerabilities in the database

CVE-2021-3748

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.

  • Published: Mar 23, 2022
  • Updated: Apr 14, 2023
  • CVE: CVE-2021-3748
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.9
  • AV:L/AC:M/Au:N/C:C/I:C/A:C

CWEs: