---
id: CVE-2026-74690
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/ism: Fix UAF of sba and ieq during ism_dev_exit()

  A ism interrupt handler can be active in parallel with ism_dev_exit(),
  accessing freed data structures.

  No new …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/ism: Fix UAF of sba and ieq during ism_dev_exit()

  A ism interrupt handler can be active in parallel with ism_dev_exit(),
  accessing freed data structures.

  No new …
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74690'
references:
  - url: 'https://git.kernel.org/stable/c/774394d27930ec4cf4cb3eed8ab6a4d20cb2430a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b1896543ce59c4258625a35cf41e23a9a1f80ea2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc3021284050ecb3bba8a7851340cedcb5037928'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00194
epssPercentile: 0.08387
ingestedAt: '2026-10-14T13:30:58.538Z'
---

## Overview

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

s390/ism: Fix UAF of sba and ieq during ism_dev_exit()

A ism interrupt handler can be active in parallel with ism_dev_exit(),
accessing freed data structures.

No new interrupts will be generated after unregister_ieq(). Drain ongoing
interrupt handlers by free_irq(), before freeing ism data structures.

## Remediation

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