CVE scanner is unable to parse the version of linux kernel recipe, which
caused warnings to be produced during the scan task since kernel version
was not properly identified.
This was caused by the fact that CVE_VERSION is set per default to PV,
and PV of this receipe does nto resolve in a proper (and actual) kernel
version provided.
By setting CVE_VERSION to explicitly point to KERNEL_VERSION, this recipe
effectively provides a proper kernel version to CVE scanner.
