CVE-2020-27673

5.5 MEDIUM 0.4% exploit odds Fix listed

What it is

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2020-10-22 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:09 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 5.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2020-10-22 21:15 UTC
Last modified: 2026-06-17 03:09 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Record status: Modified

Affected

Linux Kernel < 4.4.244
Linux Kernel < 4.9.244
Linux Kernel < 4.14.207
Linux Kernel < 4.19.155
Linux Kernel < 5.4.75
Linux Kernel < 5.9.5
Linux Kernel 5.10
Debian Linux 9.0

Attack profile CVSS 3.1 · 5.5

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-27673.md and follow it. Check whether this project is affected by CVE-2020-27673. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record