---
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
  - url: 'https://git.kernel.org/stable/c/950dac9e8c4e3cf68fa8c01f77d3ac3b7369c6a9'
  - url: 'https://git.kernel.org/stable/c/58803870ba0841e53b630a1290c6838b091dd128'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74690.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74690'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2521494'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74690'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74690'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-74690'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026082233-CVE-2026-74690-0118@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00196
epssPercentile: 0.09187
ingestedAt: '2026-10-14T13:30:58.538Z'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <
    950dac9e8c4e3cf68fa8c01f77d3ac3b7369c6a9
  - >-
    Linux >= 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <
    58803870ba0841e53b630a1290c6838b091dd128
  - >-
    Linux >= 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <
    fc3021284050ecb3bba8a7851340cedcb5037928
  - >-
    Linux >= 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <
    774394d27930ec4cf4cb3eed8ab6a4d20cb2430a
  - >-
    Linux >= 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <
    b1896543ce59c4258625a35cf41e23a9a1f80ea2
  - Linux 4.19
cwe:
  - CWE-416
scores:
  nvd: 8.4
  vendor: 4.7
---

## 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.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74690.json)