{"schemaVersion":3,"id":"CVE-2020-25221","aliases":["UBUNTU-CVE-2020-25221","DEBIAN-CVE-2020-25221"],"status":"published","duplicateOf":null,"title":null,"description":"get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. 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