---
id: CVE-2026-97423
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cxl/region: Validate partition index before array access

  construct_region() reads cxled->part and uses it to index
  cxlds->part[] without checking for a negative value.…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cxl/region: Validate partition index before array access

  construct_region() reads cxled->part and uses it to index
  cxlds->part[] without checking for a negative value.…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    06322da06116f1ee52271dd4d84dc69580087df7
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    16329b510f76e5b824e05bf8add8b29850f1f16f
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:25.867'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97423'
references:
  - url: 'https://git.kernel.org/stable/c/06322da06116f1ee52271dd4d84dc69580087df7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/16329b510f76e5b824e05bf8add8b29850f1f16f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.884Z'
---

## Overview

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

cxl/region: Validate partition index before array access

construct_region() reads cxled->part and uses it to index
cxlds->part[] without checking for a negative value. If the
partition was never resolved, part remains at its initial value
of -1, causing an out-of-bounds array access.

Add a guard to return -EBUSY when part is negative.

The check was dropped during a merge.

## Remediation

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