---
id: CVE-2026-90216
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ubi: Fix rollback for explicit UBI device numbers

  ubi_init_attach() rolls back module initialization failures by scanning
  ubi_devices[0..i-1], where i is the mtd= para…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ubi: Fix rollback for explicit UBI device numbers

  ubi_init_attach() rolls back module initialization failures by scanning
  ubi_devices[0..i-1], where i is the mtd= para…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    83c978921688af40dcab6db74882d1ff9b0b765c
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    4417ab6ecad01cf2d01045ef8104c95a66b0e893
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    552e565ed8846e7db143e4a6bdf3f5677453c686
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    9754f049d5f1945d4c691d1f52824eb8daf8f9be
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    e3f7e58189bc222971ddc860f1716f37e51ba996
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    87b3da4acb860605643ebee312178f13b20744cf
  - >-
    Linux >= 83ff59a066637a6c28844bbf43009459408240f4 <
    5b0a6b554e12a97f9771a9a9f4ea1f5457373c73
  - Linux 3.11
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:16.900'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90216'
references:
  - url: 'https://git.kernel.org/stable/c/4417ab6ecad01cf2d01045ef8104c95a66b0e893'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/552e565ed8846e7db143e4a6bdf3f5677453c686'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5b0a6b554e12a97f9771a9a9f4ea1f5457373c73'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/83c978921688af40dcab6db74882d1ff9b0b765c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/87b3da4acb860605643ebee312178f13b20744cf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9754f049d5f1945d4c691d1f52824eb8daf8f9be'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e3f7e58189bc222971ddc860f1716f37e51ba996'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.856Z'
epss: 0.00177
epssPercentile: 0.07467
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

ubi: Fix rollback for explicit UBI device numbers

ubi_init_attach() rolls back module initialization failures by scanning
ubi_devices[0..i-1], where i is the mtd= parameter index. That assumes
the parameter index matches the UBI device number.

That assumption is not true when mtd= specifies an explicit ubi_num. A
successfully attached device can be stored at a higher ubi_devices[]
slot, and a later failure can miss it during rollback.

Scan the full ubi_devices[] array and detach by the actual array index,
matching the way UBI devices are stored.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.