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.

Link	Resource
https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6	Patch 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
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html	Mailing List Patch
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20220425-0004/	Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List Third Party Advisory

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* cpe:2.3:o:redhat:enterprise_linux_advanced_virtualization_eus:8.4:*:*:*:*:*:*:*

---

Published : 2022-03-23 08:15

Updated : 2023-01-03 03:16

---

NVD link : CVE-2021-3748

Mitre link : CVE-2021-3748

No products.

CWE-416