CVE-2021-3748
- State
- Published
- Severity
- Not scored
- Published
- Mar 23, 2022
- Updated
- Aug 3, 2024
- Reserved
- Aug 30, 2021
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.
Scores
The record has no CVSS score.
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
QEMU (virtio-net)n/a |
|
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1998514
- https://ubuntu.com/security/CVE-2021-3748
- https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6
- https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html
- [debian-lts-announce] 20220404 [SECURITY] [DLA 2970-1] qemu security updatemailing-list
- https://security.netapp.com/advisory/ntap-20220425-0004/
- GLSA-202208-27vendor-advisory
- [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security updatemailing-list
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