Improper initialization in Linux kernel - CVE-2026-93076
Published: September 18, 2026
Vulnerability identifier: #VU150935
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93076
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect vmemmap construction.
The vulnerability exists due to improper initialization of vmemmap_shift in static pgmap handling in fsdev_dax_probe when rebinding a static DAX device from device_dax to fsdev_dax. A local user can rebind a static DAX device to cause incorrect vmemmap construction.
fsdev DAX requires the vmemmap to be built for order-0 folios.
Affected software
Linux kernel
How to mitigate CVE-2026-93076
Install security update from vendor's repository.