---
id: CVE-2026-90152
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb/server: fix session leak in ksmbd_session_register()

  See the procedure below:

    smb2_sess_setup
      ksmbd_smb2_session_create
        __session_create
          atomi…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb/server: fix session leak in ksmbd_session_register()

  See the procedure below:

    smb2_sess_setup
      ksmbd_smb2_session_create
        __session_create
          atomi…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f5c779b7ddbda30866cf2a27c63e34158f858c73 <
    03a22a003f41b182245e6c71fe565e277cff7094
  - >-
    Linux >= f5c779b7ddbda30866cf2a27c63e34158f858c73 <
    b967a595fb735d313a8676b2ca6a4cba38506482
  - >-
    Linux >= f5c779b7ddbda30866cf2a27c63e34158f858c73 <
    55c677619084f9c9fa4146d933cc8ccafc924c87
  - >-
    Linux >= f5c779b7ddbda30866cf2a27c63e34158f858c73 <
    99b25b046e47e4904373cfeb445c5483f1633d88
  - Linux 708c304b583d789957399dd8237f212cf8ad1e4d
  - Linux f623f627ad2b1dc215ab3b0df53fb05cfd3a1c3b
  - Linux d270631c21e68fb8016d6e231d022d7023a2df6f
  - Linux 02f41d88f15d6b7d523e52cc3f87488f57e9265b
  - Linux >= 5.15.145 < 5.16
  - Linux >= 6.1.29 < 6.2
  - Linux >= 6.2.16 < 6.3
  - Linux >= 6.3.2 < 6.4
  - Linux 6.4
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:08.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90152'
references:
  - url: 'https://git.kernel.org/stable/c/03a22a003f41b182245e6c71fe565e277cff7094'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/55c677619084f9c9fa4146d933cc8ccafc924c87'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/99b25b046e47e4904373cfeb445c5483f1633d88'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b967a595fb735d313a8676b2ca6a4cba38506482'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.875Z'
epss: 0.002
epssPercentile: 0.10138
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

smb/server: fix session leak in ksmbd_session_register()

See the procedure below:

  smb2_sess_setup
    ksmbd_smb2_session_create
      __session_create
        atomic_set(&sess->refcnt, 2)
        hash_add(sessions_table, &sess->hlist, sess->id)
    ksmbd_session_register
      xa_store(&conn->sessions, sess->id, sess) // fail
    ksmbd_user_session_put
      atomic_dec(&sess->refcnt) // refcnt is 1, session is not freed

Remove the session from sessions_table and drop its table reference if
xa_store() fails.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.