[Bug 296594] TCP: RFC 5961 sends a challenge ACK instead of resetting when a valid RST arrives with SEG.SEQ == RCV.NXT and the receiver has delayed-ACKed data, leaving the connection half-open

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 08 Jul 2026 09:40:23 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296594

--- Comment #2 from Thomas Grainger <tagrain@gmail.com> ---
Created attachment 272595
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=272595&action=edit
proposed patch

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