CVE-2026-74744 ipvlan: inherit needed_headroom and needed_tailroom from phy_dev

In the Linux kernel, the following vulnerability has been resolved: ipvlan: inherit neededheadroom and neededtailroom from phydev ipvlan devices inherit hardheaderlen from phydev during ipvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying phydev or stacked lower...

CVE-2026-74744

CVE-2026-74744 affects the Linux kernel ipvlan subsystem. During ipvlan_init(), ipvlan devices inherit hard_header_len from the physical device but leave needed_headroom and needed_tailroom set to zero. When the underlying device requires extra space for headers or trailers (e.g., macsec, ipsec, ...