SB20260918138 - Race condition in Linux kernel dax driver
Published: September 18, 2026
Security Bulletin ID
SB20260918138
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-93073)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in dax_holder_notify_failure() when fs_put_dax() concurrently clears holder_ops. A local user can trigger the race to dereference a null holder_ops pointer.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873
- https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba
- https://git.kernel.org/stable/c/6a37acecc7c29136235cbc446a1b89e81414344b
- https://git.kernel.org/stable/c/7ae9d15bdcde0f2955ae13b6a95587f9e23b2359
- https://git.kernel.org/stable/c/eb412f80311fc7ab6eb3203091a3fe59a5e9fd30
- https://git.kernel.org/stable/c/ee1251621d1c7cf3155c6704542cbb358d799968