CVE-2026-90169ksmbd: free preauth sessions on connection teardown
- —Not scoredno CVSS score yet
- 0.25%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 43 days later
· 43 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < 1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < effcf48d79d8aa53113d8289e140746f25ceb62c
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < b62b1ebb25f0a19067ed5b1a86036b2dc98be44f
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < a41a98ee16ae038751b6639decadaa3ce15ca18a
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < 8e2ebc77678832e981adc008d25cd8f67d08ebc4
- affected f5a544e3bab78142207e0242d22442db85ba1eff – < 06c7b1d731bc105a8644f1b70165ba8b9416cbab
- affected 5.15
- unaffected < 5.15
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683 (opens in a new tab)
- https://git.kernel.org/stable/c/effcf48d79d8aa53113d8289e140746f25ceb62c (opens in a new tab)
- https://git.kernel.org/stable/c/b62b1ebb25f0a19067ed5b1a86036b2dc98be44f (opens in a new tab)
- https://git.kernel.org/stable/c/a41a98ee16ae038751b6639decadaa3ce15ca18a (opens in a new tab)
- https://git.kernel.org/stable/c/8e2ebc77678832e981adc008d25cd8f67d08ebc4 (opens in a new tab)
- https://git.kernel.org/stable/c/06c7b1d731bc105a8644f1b70165ba8b9416cbab (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-81762 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-90169)Record last updated .