What is CVE-2020-10566?

CVE-2020-10566 is a high-severity vulnerability in Freebsd, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2020-03-14.

How severe is CVE-2020-10566?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-10566 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Freebsd

CVE-2020-10566

grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, mishandles font loading by a guest through a grub2.cfg file, leading to a buffer overflow.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (26.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freebsd
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

renorobert/grub-bhyve-bugs

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-10566?: CVE-2020-10566 is a high-severity vulnerability in Freebsd, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2020-03-14.
How severe is CVE-2020-10566?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-10566 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.