The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 25.3%