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CVE-2021-20203

LOWCVSS 3.2/10EPSS 0.59%

Last modified

CVE-2021-20203 is a low-severity vulnerability rated 3.2/10 on the CVSS scale. 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. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
3.2/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

EPSS Probability
0.59%

43.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
QemuQemu<= 5.2.0
FedoraprojectFedora33
DebianDebian Linux9.0
DebianDebian Linux10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-20203?
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 severe is CVE-2021-20203?
CVE-2021-20203 has a CVSS score of 3.2/10 (LOW severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20203?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20203?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST