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CVE-2026-98553

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

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3684e2273ba94553af3c5195a46a50214a1a96e3Also 0662b1ff9b383d5a233d344e4dc518c27a17f7b8, 34fa4c1c6e10507dc60e35a82cc9655666946cfd and 1 moreCVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 3684e2273ba94553af3c5195a46a50214a1a96e3LinuxCVE List
  • 0662b1ff9b383d5a233d344e4dc518c27a17f7b8LinuxCVE List
  • 34fa4c1c6e10507dc60e35a82cc9655666946cfdLinuxCVE List
  • 4bcb371019097d0e357f097902587401c509bbc9LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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().

Text from CVE List

Affected versions 18

  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before 3684e2273ba94553af3c5195a46a50214a1a96e3CVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before 0662b1ff9b383d5a233d344e4dc518c27a17f7b8CVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before 34fa4c1c6e10507dc60e35a82cc9655666946cfdCVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before a58593b501b7be5ad2bc5181bfa8cd4599be257cCVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before f1c57f5b16bbc3571bd479c290996c4d4e1fb931CVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before 4bcb371019097d0e357f097902587401c509bbc9CVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6CVE List
  • Linuxaffected: ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 before aa5e44b29ffe4eaa08cc2237fd65bc2596bc023eCVE List
  • Linuxaffected: 4.18CVE List
  • Linuxunaffected: all versions before 4.18CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 8