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.
References
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 Third Party Advisory |
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html | Mailing List Patch Third Party Advisory |
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 |
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Information
Published : 2022-03-23 13:15
Updated : 2023-01-03 07:16
NVD link : CVE-2021-3748
Mitre link : CVE-2021-3748
JSON object : View
CWE
CWE-416
Use After Free
Products Affected
redhat
- enterprise_linux
- enterprise_linux_advanced_virtualization_eus
fedoraproject
- fedora
canonical
- ubuntu_linux
qemu
- qemu
debian
- debian_linux