In the Linux kernel, the following vulnerability has been resolved:

netfilter: ip6tables: mark malformed IPv6 extension headers for hotdrop

The ah, hbh and rt matches check that the fixed extension header is
present, then use the header length field to derive the advertised
extension header length for matching.

For the ah match, add the missing advertised-length check. For hbh
and rt, update the existing advertised-length checks. In all three
cases, set hotdrop to true before returning false when the advertised
extension header length exceeds the available skb data.

Returning false treats the packet as a rule mismatch. Set hotdrop to
true and drop malformed packets so they cannot bypass rules intended
to drop packets with these IPv6 extension headers.

https://git.kernel.org/stable/c/2fd89a50a9783eed8ed23866b11c8b3d8779a7a8

https://git.kernel.org/stable/c/3578b6d92a5b1e603ae6e8c8f5538a709f03aba4

https://git.kernel.org/stable/c/3d441be2b1c5e98167302fa1c7b61960a067b112

https://git.kernel.org/stable/c/43ccc20b5a733226417832cf16ef45322e594990

https://git.kernel.org/stable/c/d5e39e5eb6b30bc4a3bb7aba54c293cf36a806c7

https://git.kernel.org/stable/c/f16d856b6af5fd0e7cb0b0212f70825b599ef72e

https://git.kernel.org/stable/c/f775fcf384b06f35b612f78fa5601fee99eb6513

https://git.kernel.org/stable/c/fc416870100cf16d5b9495199355a679c3a02d48

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