CVE-2021-20203
LOWQEMU < 5.2.0 - Denial of Service via vmxnet3 NIC Parameter Integer Overflow
Title source: llmDescription
An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
References (5)
Core 5
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1922441
Exploit, Patch, Third Party Advisory x_refsource_misc
https://bugs.launchpad.net/qemu/+bug/1913873
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202208-27
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Scores
CVSS v3
3.2
EPSS
0.0003
EPSS Percentile
9.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Details
CWE
CWE-190
Status
published
Products (4)
debian/debian_linux
9.0
debian/debian_linux
10.0
fedoraproject/fedora
33
qemu/qemu
< 5.2.0
Published
Feb 25, 2021
Tracked Since
Feb 18, 2026