Conversation
mptcp

Multipath TCP

Many people are talking about MPTCP these days, that's great 😃

Okay, maybe that's caused by an advertisement from Anthropic and linked to CVE-2026-98432? 🤔

BTW, MPTCP was one exploitation path for this issue in TCP, there could be others. So upgrade your server (and/or block IPv4 options), don't "just" disable MPTCP.

(Not sure how such a high score got assigned for something hard to reproduce in practice and probably impossible on the internet where IPv4 options are often blocked. But that's good to remind people to keep their system up to date 🙂)

And thank you Eric for the fix!

#MPTCP
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