Tommi Rantala

The issue is related to the mm subsystem in the Linux kernel, which does not properly enforce the CONFIG STRICT DEVMEM protection mechanism. This allows local users to read or write to kernel memory locations in the first megabyte, bypassing slab-allocation access restrictions, by opening the /dev/mem file. The affected files are arch/x86/mm/init.c and drivers/char/mem.c.

The issue is related to the ` skb recv datagram` function in the Linux kernel, which does not properly handle the `MSG PEEK` flag with zero-length data. This allows local users to cause a denial of service, resulting in an infinite loop and system hang, via a crafted application.