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netfilter: require Ethernet MAC header before using eth_hdr()

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.

Affected products

Linux
  • <726abf97566867f808fec9d8a408eb9698bd570a
  • <6.1.176
  • =<6.6.*
  • <5.15.210
  • =<6.18.*
  • <063f43361e884acd7300790e90194430275d0d0c
  • =<*
  • <6.12.94
  • =<6.1.*
  • <4435888e1bf139d2bfe5911643d4217382136743
  • <cea435ea7e868ea6fdf039bc4f2090c1d829b556
  • <6.6.143
  • <367abcacc13a8e2e7624408b7f593bd1e60e49d9
  • =<5.15.*
  • =<6.12.*
  • =<7.0.*
  • <7.0.13
  • <6.18.36
  • <62443dc21114c0bbc476fa62973db89743f2f137
  • <5d634afb8b83b49de562792fd0d047416a43bd4d