CVE-2026-90169ksmbd: free preauth sessions on connection teardown
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f5a544e3bab78142207e0242d22442db85ba1eff before effcf48d79d8aa53113d8289e140746f25ceb62c; from f5a544e3bab78142207e0242d22442db85ba1eff before b62b1ebb25f0a19067ed5b1a86036b2dc98be44f; from f5a544e3bab78142207e0242d22442db85ba1eff before a41a98ee16ae038751b6639decadaa3ce15ca18a; from f5a544e3bab78142207e0242d22442db85ba1eff before 8e2ebc77678832e981adc008d25cd8f67d08ebc4; from f5a544e3bab78142207e0242d22442db85ba1eff before 06c7b1d731bc105a8644f1b70165ba8b9416cbab | CNA record |
References
- https://git.kernel.org/stable/c/effcf48d79d8aa53113d8289e140746f25ceb62c
- https://git.kernel.org/stable/c/b62b1ebb25f0a19067ed5b1a86036b2dc98be44f
- https://git.kernel.org/stable/c/a41a98ee16ae038751b6639decadaa3ce15ca18a
- https://git.kernel.org/stable/c/8e2ebc77678832e981adc008d25cd8f67d08ebc4
- https://git.kernel.org/stable/c/06c7b1d731bc105a8644f1b70165ba8b9416cbab
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.