Memory leak in Linux kernel - CVE-2026-90215
Published: September 19, 2026
Vulnerability identifier: #VU151273
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90215
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to prevent a device object from being released.
The vulnerability exists due to improper device reference management in ubi_detach_mtd_dev() when attempting to detach a busy UBI device. A local user can attempt to detach a busy UBI device to prevent a device object from being released.
Affected software
Linux kernel
How to mitigate CVE-2026-90215
Install security update from vendor's repository.