---
id: CVE-2026-74629
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/dibs: Correct freeing of dmb_clientid_arr

  A dibs device interrupt handler can be active after dibs_dev_del() and
  may still access dmb_clientid_arr
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/dibs: Correct freeing of dmb_clientid_arr

  A dibs device interrupt handler can be active after dibs_dev_del() and
  may still access dmb_clientid_arr. (UAF)

  In case …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= cc21191b584c6f7836b0f10774f8278b7cbfba10 <
    ece6426b61241e9bfb41aa131f235168f55229b1
  - >-
    Linux >= cc21191b584c6f7836b0f10774f8278b7cbfba10 <
    7a1df20a8d2cc89e3a442b6e0b43b1cacde8d403
  - >-
    Linux >= cc21191b584c6f7836b0f10774f8278b7cbfba10 <
    9e6869be49064915edb6c8776b27c376cfdb0df5
  - Linux 6.18
published: '2026-08-22'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:17:47.947'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74629'
references:
  - url: 'https://git.kernel.org/stable/c/7a1df20a8d2cc89e3a442b6e0b43b1cacde8d403'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e6869be49064915edb6c8776b27c376cfdb0df5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ece6426b61241e9bfb41aa131f235168f55229b1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74629.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74629'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2521411'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74629'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74629'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-74629'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026082221-CVE-2026-74629-6db1@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00375
epssPercentile: 0.31297
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:02:53.858815Z'
scores:
  nvd: 8.8
  vendor: 5.3
ingestedAt: '2026-10-14T13:30:58.520Z'
---

## Overview

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

net/dibs: Correct freeing of dmb_clientid_arr

A dibs device interrupt handler can be active after dibs_dev_del() and
may still access dmb_clientid_arr. (UAF)

In case of a failure in dibs_dev_add() being called by dibs_lo_dev_probe()
dmb_clientid_arr is freed twice (double free).

Free dmb_clientid_arr in dibs_dev_release() after last reference is gone.
Note that allocating in dibs_dev_add() instead of dibs_dev_alloc() is ok
for now, because no dmbs can be registered before dibs_dev_add().

## 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-2026-74629.json)