---
id: CVE-2026-98553
title: 'autofs: fix sbi->pipe file reference leak in autofs_kill_sb()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  autofs: fix sbi->pipe file reference leak in autofs_kill_sb()

  When autofs_fill_super() fails before clearing AUTOFS_SBI_CATATONIC (for
  example, when find_get_pid() fai…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    3684e2273ba94553af3c5195a46a50214a1a96e3
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    0662b1ff9b383d5a233d344e4dc518c27a17f7b8
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    34fa4c1c6e10507dc60e35a82cc9655666946cfd
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    a58593b501b7be5ad2bc5181bfa8cd4599be257c
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    f1c57f5b16bbc3571bd479c290996c4d4e1fb931
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    4bcb371019097d0e357f097902587401c509bbc9
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6
  - >-
    Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 <
    aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e
  - Linux 4.18
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:18:20.728Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98553'
references:
  - url: 'https://git.kernel.org/stable/c/3684e2273ba94553af3c5195a46a50214a1a96e3'
  - url: 'https://git.kernel.org/stable/c/0662b1ff9b383d5a233d344e4dc518c27a17f7b8'
  - url: 'https://git.kernel.org/stable/c/34fa4c1c6e10507dc60e35a82cc9655666946cfd'
  - url: 'https://git.kernel.org/stable/c/a58593b501b7be5ad2bc5181bfa8cd4599be257c'
  - url: 'https://git.kernel.org/stable/c/f1c57f5b16bbc3571bd479c290996c4d4e1fb931'
  - url: 'https://git.kernel.org/stable/c/4bcb371019097d0e357f097902587401c509bbc9'
  - url: 'https://git.kernel.org/stable/c/fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6'
  - url: 'https://git.kernel.org/stable/c/aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.263Z'
---

## Overview

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

autofs: fix sbi->pipe file reference leak in autofs_kill_sb()

When autofs_fill_super() fails before clearing AUTOFS_SBI_CATATONIC (for
example, when find_get_pid() fails on an invalid pgrp mount option, or
when an fs_context is closed before mounting), deactivate_locked_super()
invokes autofs_kill_sb() -> autofs_catatonic_mode(sbi).

Because AUTOFS_SBI_CATATONIC is still set in sbi->flags,
autofs_catatonic_mode() returns early without calling fput(sbi->pipe),
permanently leaking the pipe struct file reference.

Explicitly release sbi->pipe in autofs_kill_sb() if it is still non-NULL
after autofs_catatonic_mode().

## Affected

- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < 3684e2273ba94553af3c5195a46a50214a1a96e3`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < 0662b1ff9b383d5a233d344e4dc518c27a17f7b8`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < 34fa4c1c6e10507dc60e35a82cc9655666946cfd`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < a58593b501b7be5ad2bc5181bfa8cd4599be257c`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < f1c57f5b16bbc3571bd479c290996c4d4e1fb931`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < 4bcb371019097d0e357f097902587401c509bbc9`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6`
- `Linux >= ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 < aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e`
- `Linux 4.18`

## Remediation

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