SB20260424274 - Race condition in Linux kernel ext4

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Main Vulnerability Database SB20260424274

SB20260424274 - Race condition in Linux kernel ext4

Published: April 24, 2026

Security Bulletin ID SB20260424274
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-2026-31450)

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 ext4_inode_attach_jinode() when handling concurrent fast commit flush operations. A local user can trigger concurrent filesystem activity to cause a denial of service.

The issue occurs because a jinode pointer may be observed as non-NULL before its associated i_vfs_inode field is initialized, leading to a kernel crash when the fast commit flush path dereferences it.


Remediation

Install update from vendor's website.

References