CVE-2026-63971

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> sctp: fix race between sctp_wait_for_connect and peeloff<br /> <br /> sctp_wait_for_connect() drops and re-acquires the socket lock while<br /> waiting for the association to reach ESTABLISHED state. During this<br /> window, another thread can peeloff the association to a new socket via<br /> getsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc-&gt;base.sk. After<br /> re-acquiring the old socket lock, sctp_wait_for_connect() returns<br /> success without noticing the migration — the caller then accesses<br /> the association under the wrong lock in sctp_datamsg_from_user().<br /> <br /> Add the same sk != asoc-&gt;base.sk check that sctp_wait_for_sndbuf()<br /> already has, returning an error if the association was migrated while<br /> we slept.