CVE-2026-90169
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: free preauth sessions on connection teardown SMB3.1.1 multichannel binding preserves the preauthentication hash in a preauth_session between the NTLM negotiate and authenticate requests. The binding NTLM negotiate allocates this object and returns STATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends the authenticate request, neither the authenticate nor error cleanup paths free the object. Release any remaining preauthentication sessions when tearing down the connection. Initialize the list when allocating the connection so that this cleanup is safe regardless of the negotiated dialect.
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/06c7b1d731bc105a8644f1b70165ba8b9416cbab
- https://git.kernel.org/stable/c/8e2ebc77678832e981adc008d25cd8f67d08ebc4
- https://git.kernel.org/stable/c/a41a98ee16ae038751b6639decadaa3ce15ca18a
- https://git.kernel.org/stable/c/b62b1ebb25f0a19067ed5b1a86036b2dc98be44f
- https://git.kernel.org/stable/c/effcf48d79d8aa53113d8289e140746f25ceb62c
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.