Improper resource shutdown or release in Linux kernel - CVE-2026-52990
Published: June 25, 2026
Vulnerability identifier: #VU135392
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52990
CWE-ID: CWE-404
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 resource shutdown or release in fsnotify_recalc_mask() when handling concurrent mark attach and detach operations. A local user can trigger the race condition to cause a denial of service.
The issue can manifest as a hung task during unmount operations.
How to mitigate CVE-2026-52990
Install security update from vendor's repository.