CVE-2026-52929
In the Linux kernel, the following vulnerability has been resolved: sctp: stream: fully roll back denied add-stream state When ADD_OUT_STREAMS is denied, SCTP only shrinks the queued chunks and then lowers outcnt. That leaves removed stream metadata behind, so a later re-add can reuse a stale ext and hit a null-pointer dereference in the scheduler get path. Fix the rollback by tearing down the removed stream state the same way other stream resizes do. Unschedule the current scheduler state, drop the removed stream ext state with sctp_stream_outq_migrate(), and then reschedule the remaining streams. This keeps scheduler-private RR/FC/PRIO lists consistent while fully rolling back denied outgoing stream additions.
Affected versions
Linux kernel versions
4.15
and later are affected. Fixed in
5.10.259,
5.15.210,
6.1.176,
6.6.143,
6.12.94,
6.18.36,
7.0.13,
7.1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-52929?
CVE-2026-52929 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.15 onward and has been patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-52929 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-52929?
Yes — CVE-2026-52929 has been patched. Fixed versions include 5.10.259, 5.15.210, 6.1.176 and others. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-52929 actively exploited?
No — CVE-2026-52929 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.