VDB
DEBIAN-CVE-2021-3748
DEBIAN-CVE-2021-3748
PUBLISHED
CVSS 7.5 HIGH
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.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | qemu | 0, 5.2+dfsg, 0 |
| Debian:13 | qemu | 0, 0, 0 |
| Debian:12 | qemu | 0, 0, 0 |
| Debian:14 | qemu | 0, 0, 0 |
Timeline
- Mar 23, 2022 CVE Published
- Apr 28, 2026 CVE Updated