DISPUTED An issue was discovered in the efi subsystem in the Linux kernel through 5.1.5. physefisetvirtualaddressmap in arch/x86/platform/efi/efi.c and eficallphysprolog in arch/x86/platform/efi/efi_64.c mishandle memory allocation failures. NOTE: This id is disputed as not being an issue because “All the code touched by the referenced commit runs only at boot, before any user processes are started. Therefore, there is no possibility for an unprivileged user to control it.”.