Improper Enforcement of Behavioral Workflow in Linux kernel - CVE-2026-90095
Published: September 19, 2026
Vulnerability identifier: #VU151383
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-90095
CWE-ID: CWE-841
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state validation in fuse_uring_cmd() when processing IORING_OP_URING_CMD requests on a FUSE connection that did not negotiate FUSE_OVER_IO_URING while I/O is active. A local user can issue an IORING_OP_URING_CMD request to cause a deadlock.
Affected software
Linux kernel
How to mitigate CVE-2026-90095
Install security update from vendor's repository.