SB2026091906 - Incomplete cleanup in Linux kernel mtd ubi driver

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Main Vulnerability Database SB2026091906

SB2026091906 - Incomplete cleanup in Linux kernel mtd ubi driver

Published: September 19, 2026

Security Bulletin ID SB2026091906
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Incomplete cleanup (CVE-ID: CVE-2026-90216)

CWE-ID: CWE-459 - Incomplete cleanup

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to leave UBI devices attached after failed module initialization.

The vulnerability exists due to incomplete cleanup in ubi_init_attach() when rolling back initialization after an mtd= parameter specifies an explicit UBI device number. A local privileged user can configure an explicit UBI device number and trigger a later initialization failure to leave UBI devices attached after failed module initialization.


Remediation

Install update from vendor's website.

References