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CVE-2026-90166VulnerabilityPublished Updated

ksmbd_ipc_tree_connect_request() · smb/server: fix null-ptr-deref

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-90166· Medium

Not known to be exploited · fixed in d601be98c9445894c759c28d4a7a52151387f1fb : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:19 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in d601be98c9445894c759c28d4a7a52151387f1fb, d2ccf905f47d2344270749f4dfa905afcd3edeb0, 8461f27902727ad434375caf13a0100aafc0340f +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < d601be98c9445894c759c28d4a7a52151387f1fb
Fixed in
  • d601be98c9445894c759c28d4a7a52151387f1fb
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < d2ccf905f47d2344270749f4dfa905afcd3edeb0
Fixed in
  • d2ccf905f47d2344270749f4dfa905afcd3edeb0
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 8461f27902727ad434375caf13a0100aafc0340f
Fixed in
  • 8461f27902727ad434375caf13a0100aafc0340f
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 7065d3648b1a48d2c49da3d6364dd3c4d503b10c
Fixed in
  • 7065d3648b1a48d2c49da3d6364dd3c4d503b10c
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 5ffd180307a5ea34dae7f90ff9573ebed6b7fb12
Fixed in
  • 5ffd180307a5ea34dae7f90ff9573ebed6b7fb12
LinuxLinuxAffected
  • ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 4eb74a34ea401abfbbd5991076715dae3de938df
Fixed in
  • 4eb74a34ea401abfbbd5991076715dae3de938df

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

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