What’s Vulnerable › Vulnerabilities

CVE-2020-24385

• Severity: medium (CVSS 5.5 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: 2020-09-03 · updated 2026-06-17
• Weakness: CWE-476

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().

Affected products

• FreeBSD: through 7.0
• Midnightbsd: before 1.2.6; from 1.3 through 2020-08-19 — fixed in 1.2.6

How to fix

Upgrade to a fixed version: Midnightbsd 1.2.6. Check the vendor advisory for mitigations.

References

• http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txt
• https://www.midnightbsd.org/notes/
• http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txt
• https://www.midnightbsd.org/notes/

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