---
id: CVE-2022-49893
title: 'cxl/region: Fix cxl_region leak, cleanup targets at region delete'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cxl/region: Fix cxl_region leak, cleanup targets at region delete

  When a region is deleted any targets that have been previously assigned
  to that region hold reference…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b9686e8c8e39d4072081ef078c04915ee51c8af4 <
    45d9fb4b758b9d602ee7776eb6754b0349946aad
  - >-
    Linux >= b9686e8c8e39d4072081ef078c04915ee51c8af4 <
    0d9e734018d70cecf79e2e4c6082167160a0f13f
  - Linux 6.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:51:14.364112Z'
published: '2025-05-01'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:00:10.934Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-49893'
references:
  - url: 'https://git.kernel.org/stable/c/45d9fb4b758b9d602ee7776eb6754b0349946aad'
  - url: 'https://git.kernel.org/stable/c/0d9e734018d70cecf79e2e4c6082167160a0f13f'
tags:
  - cve.org
epss: 0.0017
epssPercentile: 0.06436
ingestedAt: '2026-11-05T22:38:31.623Z'
---

## Overview

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

cxl/region: Fix cxl_region leak, cleanup targets at region delete

When a region is deleted any targets that have been previously assigned
to that region hold references to it. Trigger those references to
drop by detaching all targets at unregister_region() time.

Otherwise that region object will leak as userspace has lost the ability
to detach targets once region sysfs is torn down.

## Affected

- `Linux >= b9686e8c8e39d4072081ef078c04915ee51c8af4 < 45d9fb4b758b9d602ee7776eb6754b0349946aad`
- `Linux >= b9686e8c8e39d4072081ef078c04915ee51c8af4 < 0d9e734018d70cecf79e2e4c6082167160a0f13f`
- `Linux 6.0`

## Remediation

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