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CVE-2020-24385

MEDIUM
5.5
CVSS Score
Published: September 3, 2020 at 02:35 PM UTC
Updated: June 17, 2026 at 03:05 AM UTC
2 products affected across 2 vendorsFreeBSDMidnightbsd

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FreeBSD· Freebsd
95%
v ≤ 7.0
Midnightbsd· Midnightbsd
95%
v < 1.2.61.3 ≤ v ≤ 2020-08-19
Affected range stops below 1.2.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txt
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.midnightbsd.org/notes/

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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