---
id: CVE-2026-90433
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: oc-tiny: switch to managed controller allocation

  The controller is allocated with the non-managed spi_alloc_host() while
  the interrupt is registered with devm_req…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: oc-tiny: switch to managed controller allocation

  The controller is allocated with the non-managed spi_alloc_host() while
  the interrupt is registered with devm_req…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ce792580ea2ce6f7259b45124e9ccc4574c31606 <
    0260c94453a08491640e61f8cf0c384edbe7bd11
  - >-
    Linux >= ce792580ea2ce6f7259b45124e9ccc4574c31606 <
    ef5cc4a8c088d05549f71950a72b5deff5000fd7
  - >-
    Linux >= ce792580ea2ce6f7259b45124e9ccc4574c31606 <
    1cd16c8d68f58e54abb8f331d05469237200631f
  - >-
    Linux >= ce792580ea2ce6f7259b45124e9ccc4574c31606 <
    d710f43ce30975d197f73c543bfe47b958d8ba17
  - Linux 2.6.39
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:48.400'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90433'
references:
  - url: 'https://git.kernel.org/stable/c/0260c94453a08491640e61f8cf0c384edbe7bd11'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1cd16c8d68f58e54abb8f331d05469237200631f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d710f43ce30975d197f73c543bfe47b958d8ba17'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ef5cc4a8c088d05549f71950a72b5deff5000fd7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.790Z'
epss: 0.00168
epssPercentile: 0.0644
---

## Overview

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

spi: oc-tiny: switch to managed controller allocation

The controller is allocated with the non-managed spi_alloc_host() while
the interrupt is registered with devm_request_irq().  During removal,
spi_bitbang_stop() only unregisters the controller; the subsequent
spi_controller_put() then frees the controller together with its
embedded driver-private devdata, which is the IRQ handler's dev_id.  The
devm_request_irq() release action (free_irq()), which drains the
handler, does not run until after .remove() returns.  A late or latched
interrupt can therefore reach tiny_spi_irq() and dereference
already-freed memory (e.g. hw->base).

Switch to devm_spi_alloc_host() so that the devres LIFO order releases
the controller only after free_irq() has drained the handler, and drop
the now-redundant spi_controller_put() from .remove().  The probe error
path is simplified to direct returns.

This issue was found by an in-house static analysis tool.

## Remediation

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