CVE-2022-50032

Local service interruption via device-tree reference leak

Published Jun 18, 2025 · Updated May 11, 2026

A reference leak in the Renesas USBHS driver in Linux allows local users to deplete kernel resources during hardware initialization. The usbhs_rza1_hardware_init function obtains a reference-counted device-tree node with of_find_node_by_name but omits of_node_put after reading its clock frequency. The affected path is limited to systems using this driver, where repeated initialization accumulates unreleased node references and interrupts service through resource exhaustion.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A reference leak in the Renesas USBHS driver in Linux allows local users to deplete kernel resources during hardware initialization. The usbhs_rza1_hardware_init function obtains a reference-counted device-tree node with of_find_node_by_name but omits of_node_put after reading its clock frequency. The affected path is limited to systems using this driver, where repeated initialization accumulates unreleased node references and interrupts service through resource exhaustion.

The record

CVE
CVE-2022-50032
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.16
  2. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <36b18b777dece704b7c2e9e7947ca41a9b0fb009
  3. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <5c4b699193eba51f1bbf462d758d66f545fddd35
  4. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <9790a5a4f07f38a5add85ec58c44797d3a7c3677
  5. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <9d6d5303c39b8bc182475b22f45504106a07f086
  6. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <cfa8f707a58d68b2341a9dd0b33cf048f0628b4d
  7. Affected versionversion=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <fbdbd61a36d887e00114321c6758e359e9573a8e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <36b18b777dece704b7c2e9e7947ca41a9b0fb009; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <5c4b699193eba51f1bbf462d758d66f545fddd35; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <9790a5a4f07f38a5add85ec58c44797d3a7c3677; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <9d6d5303c39b8bc182475b22f45504106a07f086; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <cfa8f707a58d68b2341a9dd0b33cf048f0628b4d; version=aec2927b5944df70bca4bdeea6c4e7c3195dc37a <fbdbd61a36d887e00114321c6758e359e9573a8e

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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