---
id: CVE-2026-89992
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cpuidle: dt_idle_genpd: kfree() the original name allocation

  dt_idle_pd_alloc() kasprintf()s the full node path, then points
  pd->name at kbasename() of that string
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cpuidle: dt_idle_genpd: kfree() the original name allocation

  dt_idle_pd_alloc() kasprintf()s the full node path, then points
  pd->name at kbasename() of that string. dt…
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'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    1312ae33b91430ec99e69cd3d47f0e50a4ebf54b
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    a38caa9ed0d5c61c17d88393b14b292199289c1f
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    09d002c8fb0261d35ce9d8a705de5db034ee90b8
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    b519dfce1998c323e54a56f911cf708d9ba0e076
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    3394c7ba23336bdb7ece29127130fd01731d42d8
  - >-
    Linux >= 9d976d6721dfb525b81ce981e1363c70c0975aab <
    2b0ac85512b7f67479127b2713254490662eb13d
  - Linux 5.18
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:22.920'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89992'
references:
  - url: 'https://git.kernel.org/stable/c/09d002c8fb0261d35ce9d8a705de5db034ee90b8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1312ae33b91430ec99e69cd3d47f0e50a4ebf54b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2b0ac85512b7f67479127b2713254490662eb13d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3394c7ba23336bdb7ece29127130fd01731d42d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a38caa9ed0d5c61c17d88393b14b292199289c1f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b519dfce1998c323e54a56f911cf708d9ba0e076'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.947Z'
epss: 0.00196
epssPercentile: 0.08191
---

## Overview

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

cpuidle: dt_idle_genpd: kfree() the original name allocation

dt_idle_pd_alloc() kasprintf()s the full node path, then points
pd->name at kbasename() of that string. dt_idle_pd_free() kfree()s
pd->name, which is no longer the start of the allocation.

Copy the basename instead.

## Remediation

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