The fpathconf syscall function in bsd/kern/kern_descrip.c in the Darwin kernel (XNU) 8.8.1 in Apple Mac OS X allows local users to cause a denial of service (kernel panic) and possibly execute arbitrary code via a file descriptor with an unrecognized file type.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 53.4%