CVE-2020-10565

Name: CVE-2020-10565
Creator: NVD / NIST
Published: 2020-03-14T01:15:12.487+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2020-10565 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, does not validate the address provided as part of a memrw command (read_* or write_*) by a guest through a grub2.cfg file. This allows an untrusted guest to perform arbitrary read or write operations in the context of the grub-bhyve process, resulting in code execution as root on the host OS.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, does not validate the address provided as part of a memrw command (read_* or write_*) by a guest through a grub2.cfg file. This allows an untrusted guest to perform arbitrary read or write operations in the context of the grub-bhyve process, resulting in code execution as root on the host OS.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.41%

32.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	< 525916_2020-02-12

References

https://svnweb.freebsd.org/ports?view=revision&revision=525916Vendor Advisory
https://svnweb.freebsd.org/ports?view=revision&revision=525916Vendor Advisory

Timeline

Published: Mar 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10565?

How severe is CVE-2020-10565?

CVE-2020-10565 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10565?

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-2020-10565?

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

Scan your code now

Source: NVD / NIST