CVE-2026-98553: Linux kernel · autofs: fix sbi->pipe file reference leak in autofs_kill_sb()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:28 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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().
References
- ubuntu.com/security/CVE-2026-98553 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98553 (opens in a new tab)
- git.kernel.org/stable/c/34fa4c1c6e10507dc60e35a82cc9655666946cfd (opens in a new tab)
- git.kernel.org/stable/c/fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6 (opens in a new tab)
- git.kernel.org/stable/c/a58593b501b7be5ad2bc5181bfa8cd4599be257c (opens in a new tab)
- git.kernel.org/stable/c/3684e2273ba94553af3c5195a46a50214a1a96e3 (opens in a new tab)
- git.kernel.org/stable/c/f1c57f5b16bbc3571bd479c290996c4d4e1fb931 (opens in a new tab)
- git.kernel.org/stable/c/aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e (opens in a new tab)
- git.kernel.org/stable/c/0662b1ff9b383d5a233d344e4dc518c27a17f7b8 (opens in a new tab)
- git.kernel.org/stable/c/4bcb371019097d0e357f097902587401c509bbc9 (opens in a new tab)