---
id: CVE-2026-90175
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer

  Free it unconditionally after ksmbd_alloc_user() calls.

  kmemleak splat:
    unreferenced object 0…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer

  Free it unconditionally after ksmbd_alloc_user() calls.

  kmemleak splat:
    unreferenced object 0…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8a3cd890fd2a7d016a821a1c9dfd8a84d45ad320 <
    4d6fe49fa3e7fbd779c761518e6572e340233c9b
  - >-
    Linux >= a77e0e02af1c2db5fc040511aa78a58a52e116ab <
    c9f2872e91b9fe99c1d0ba768906f7aeb48c8517
  - >-
    Linux >= a77e0e02af1c2db5fc040511aa78a58a52e116ab <
    7a98c3b903b10c4d6176948254012b5ca24b071b
  - >-
    Linux >= a77e0e02af1c2db5fc040511aa78a58a52e116ab <
    abb5146b2d8197d695ea9eaa0847c73e34f00985
  - >-
    Linux >= a77e0e02af1c2db5fc040511aa78a58a52e116ab <
    1c3ebf832d010c08afe1359215d4121cb1ed2de5
  - Linux >= 6.6.141 < 6.6.157
  - Linux 6.12
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:11.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90175'
references:
  - url: 'https://git.kernel.org/stable/c/1c3ebf832d010c08afe1359215d4121cb1ed2de5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4d6fe49fa3e7fbd779c761518e6572e340233c9b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7a98c3b903b10c4d6176948254012b5ca24b071b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/abb5146b2d8197d695ea9eaa0847c73e34f00985'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c9f2872e91b9fe99c1d0ba768906f7aeb48c8517'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.868Z'
epss: 0.002
epssPercentile: 0.10131
---

## Overview

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

smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer

Free it unconditionally after ksmbd_alloc_user() calls.

kmemleak splat:
  unreferenced object 0xffff888103b83540 (size 192):
    comm "pool-0", pid 16970, jiffies 4377290937
    hex dump (first 32 bytes):
      00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  ................
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace (crc 408ccc66):
      __kvmalloc_node_noprof+0x730/0x920
      handle_generic_event+0xec/0x1a0 [ksmbd]
      genl_family_rcv_msg_doit+0xe0/0x130
      genl_rcv_msg+0x181/0x290
      netlink_rcv_skb+0x4f/0x100
      genl_rcv+0x28/0x40
      netlink_unicast+0x1e6/0x2c0
      netlink_sendmsg+0x20a/0x450
      ____sys_sendmsg+0x2e8/0x310
      ___sys_sendmsg+0x78/0xc0
      __sys_sendmsg+0x63/0xc0
      do_syscall_64+0xa1/0x670
      entry_SYSCALL_64_after_hwframe+0x76/0x7e

## Remediation

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