Riskcovery

CVE-2026-90169

ksmbd: free preauth sessions on connection teardown

State
Published
Severity
Not scored
Published
Sep 17, 2026
Updated
Oct 30, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • f5a544e3bab78142207e0242d22442db85ba1eff to before 1f60a88b2e0203e50f65b0fb9c32ecb0ae0aa683Affected
  • f5a544e3bab78142207e0242d22442db85ba1eff to before effcf48d79d8aa53113d8289e140746f25ceb62cAffected
  • f5a544e3bab78142207e0242d22442db85ba1eff to before b62b1ebb25f0a19067ed5b1a86036b2dc98be44fAffected
  • f5a544e3bab78142207e0242d22442db85ba1eff to before a41a98ee16ae038751b6639decadaa3ce15ca18aAffected
  • f5a544e3bab78142207e0242d22442db85ba1eff to before 8e2ebc77678832e981adc008d25cd8f67d08ebc4Affected
  • f5a544e3bab78142207e0242d22442db85ba1eff to before 06c7b1d731bc105a8644f1b70165ba8b9416cbabAffected
LinuxLinux
  • 5.15Affected
  • before 5.15Not affected
  • 6.1.191 through 6.1.*Not affected
  • 6.6.157 through 6.6.*Not affected
  • 6.12.110 through 6.12.*Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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