K42745412 : Linux kernel vulnerability CVE-2020-25221

Security Advisory 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. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743. (CVE-2020-25221)

Impact

There is no impact; F5 products are not affected by this vulnerability.