SB2026052991 - Race condition in Linux kernel f2fs

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Main Vulnerability Database SB2026052991

SB2026052991 - Race condition in Linux kernel f2fs

Published: May 29, 2026

Security Bulletin ID SB2026052991
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-46194)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in the f2fs extent tree handling in __destroy_extent_node() and __update_extent_tree_range() when concurrent inode drop and writeback operations occur. A local user can trigger concurrent writeback during extent node destruction to cause a denial of service.

The issue can trigger f2fs_bug_on() because new extent nodes may be inserted into the same extent tree while extent nodes are being destroyed, and EX_BLOCK_AGE updates were left unprotected.


Remediation

Install update from vendor's website.

References