CVE-2021-20203
3.2
LOW
CVSS 3.1
EPSS 0.03%
Description
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.
How to fix CVE-2021-20203
To remediate CVE-2021-20203, upgrade the affected package to a fixed version below.
- Debian/qemu—upgrade to 1:5.2+dfsg-11+deb11u3 or later
Is CVE-2021-20203 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:5.2+dfsg-11+deb11u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L |