CVE-2026-64566 xfrm: iptfs: propagate SKBFL_SHARED_FRAG in iptfs_skb_add_frags()

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: propagate SKBFLSHAREDFRAG in iptfsskbaddfrags When iptfsskbaddfrags copies frag references from the source frag walk into a new SKB, it increments the page reference count via skbfragref but does not propagate...