Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64158
Published: July 20, 2026
Vulnerability identifier: #VU138477
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-2026-64158
CWE-ID: CWE-664
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 improper state management in netfs_perform_write() when handling buffered writes on files opened for reading and writing. A local user can perform write operations that trigger write streaming disablement to cause a denial of service.
The issue is related to write streaming behavior in the netfs subsystem and was observed to cause failures in generic/522 xfstest scenarios.
How to mitigate CVE-2026-64158
Install security update from vendor's repository.