CVE-2026-52929
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85
- https://git.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151
- https://git.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418
- https://git.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44
- https://git.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cf
- https://git.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49
- https://git.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725
- https://git.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1da
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.