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Vulnerabilities CVE-2026-63971

CVE-2026-63971

None
Open
TLP:CLEAR

sctp: fix race between sctp_wait_for_connect and peeloff

AI Analysis

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Description

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

Details

EPSS Score
0.16%

6th percentile

Confidence
90%
Published
Jul 19, 2026
Last Modified
Jul 19, 2026
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