CVE-2026-90215
kernel: mtd: ubi: Release device reference on busy detach
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 6, 2026
Description
A flaw was found in the Linux kernel's Unsorted Block Images (UBI) subsystem. When a UBI device is busy and ubi_detach_mtd_dev() is called, a device reference is not properly released. This oversight prevents the device object from being freed later, potentially leading to a resource leak. An attacker could exploit this to cause a denial of service by exhausting system resources.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime