CVE-2020-24385

Name: CVE-2020-24385
Creator: NVD / NIST
Published: 2020-09-03T15:15:11.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2020-24385 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.37%

28.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Midnightbsd	Midnightbsd	< 1.2.6
Midnightbsd	Midnightbsd	>= 1.3, <= 2020-08-19
Freebsd	Freebsd	<= 7.0

References

http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txtVendor Advisory
https://www.midnightbsd.org/notes/Release Notes, Vendor Advisory
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txtVendor Advisory
https://www.midnightbsd.org/notes/Release Notes, Vendor Advisory

Timeline

Published: Sep 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24385?

How severe is CVE-2020-24385?

CVE-2020-24385 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24385?

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-2020-24385?

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

Scan your code now

Source: NVD / NIST