CVEvulnerability
CVE-2021-3748
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-03-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-416
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.
Affected configurations
• qemu qemu (>= 0.10.0 < 6.2.0)
• debian debian linux 9.0
• debian debian linux 10.0
• canonical ubuntu linux 18.04
• canonical ubuntu linux 20.04
• canonical ubuntu linux 21.10
• fedoraproject fedora 34
• redhat enterprise linux 8.0
• redhat enterprise linux advanced virtualization eus 8.4
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking, Patch, Third Party Advisory
- https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory
- https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3748 Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking, Patch, Third Party Advisory
- https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory
- https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3748 Patch, Third Party Advisory