Improper locking in Linux kernel - CVE-2026-31713
Published: May 2, 2026
Vulnerability identifier: #VU128980
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-2026-31713
CWE-ID: CWE-667
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 handling of a fatal signal in fuse sync initialization in the FUSE filesystem mount handling when initializing a FUSE filesystem with sync init while the server exits during FUSE_INIT processing. A local user can trigger a mount operation under these conditions to cause a denial of service.
The issue causes the filesystem creation to hang because the mounting thread keeps the device file descriptor open, preventing an abort from occurring.
How to mitigate CVE-2026-31713
Install security update from vendor's repository.