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().
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24385
Reference (s):
- http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txt
- https://www.midnightbsd.org/notes/