IP packet with incorrect destination MAC received by memif interface is not dropped.  Ethernet-input node should perform DMAC check and drop the packet.  Following is the packet trace showing the issue:

Input interface:

      memif1/131                         6     up   memif1/131

  Link speed: unknown

  Ethernet address 02:00:00:00:00:94

  MEMIF interface

Packet 65

00:57:29:337040: memif-input

  memif: hw_if_index 6 next-index 4

    slot: ring 0

00:57:29:337084: ethernet-input

  frame: flags 0x1, hw-if-index 6, sw-if-index 6

  IP4: 02:00:00:00:00:a6 -> 02:00:00:00:00:aa

00:57:29:337114: ip4-input

  UDP: 10.10.2.11 -> 10.10.2.18

    tos 0x00, ttl 231, length 122, checksum 0x7b42

    fragment id 0x0000, flags DONT_FRAGMENT

  UDP: 9001 -> 9002

    length 102, checksum 0x50f0

...