Race condition in Linux kernel - CVE-2026-64067
Published: July 20, 2026
Vulnerability identifier: #VU138567
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-64067
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to missing memory barriers in netfs subrequest list handling when processing netfs read and write subrequests locklessly. A local user can trigger concurrent read or write operations to cause a denial of service.
The issue affects access to stream->subrequests and subreq->flags in netfs_collect_read_results(), netfs_collect_write_results(), and related queueing logic.
How to mitigate CVE-2026-64067
Install security update from vendor's repository.