CVE-2020-10565

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-03-14 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

FreeBSD: before 525916_2020-02-12 — fixed in 525916_2020-02-12

How to fix

Upgrade to a fixed version: FreeBSD 525916_2020-02-12. Check the vendor advisory for mitigations.

References

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

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