SB20261023178 - Race condition in Linux kernel fs

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Main Vulnerability Database SB20261023178

SB20261023178 - Race condition in Linux kernel fs

Published: October 23, 2026

Security Bulletin ID SB20261023178
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-98984)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to leave mounts persistently attached to removed directories.

The vulnerability exists due to a race condition in the Linux kernel's d_set_mounted() and attach_recursive_mnt() mountpoint handling when attaching a mount to a directory undergoing removal. A local privileged user can race directory removal with moving a bind mount beneath an existing mount between detach_mounts() and d_delete() to attach a mount to the removed directory that will never be detached.


Remediation

Install update from vendor's website.

References