CVE-2022-50033

Service interruption via PowerPC OHCI reference leak

Published Jun 18, 2025 · Updated May 11, 2026

Resource leak in the Linux kernel's PowerPC OHCI host driver allows local users to exhaust memory through repeated device probing. The ohci_hcd_ppc_of_probe() function obtains a referenced device-tree node with of_find_compatible_node() but does not release it with of_node_put(). Exploitation requires local access and the PowerPC Open Firmware OHCI probe path; accumulated references can interrupt service through memory 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

Resource leak in the Linux kernel's PowerPC OHCI host driver allows local users to exhaust memory through repeated device probing. The ohci_hcd_ppc_of_probe() function obtains a referenced device-tree node with of_find_compatible_node() but does not release it with of_node_put(). Exploitation requires local access and the PowerPC Open Firmware OHCI probe path; accumulated references can interrupt service through memory exhaustion.

The record

CVE
CVE-2022-50033
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
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=2.6.29
  2. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <0334d23c56ecf1ee1563bb83e29cc5a51ed7fb4e
  3. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <0fc62bbc95319bbd330e3645afc7c286acec9ef8
  4. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <403132881e66db7aa98b55c6655daedd80d407fd
  5. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <40a959d7042bb7711e404ad2318b30e9f92c6b9b
  6. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <c5c5bd5cdcc6dc9f75f53d1c89af463d39a2bb96
  7. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <cb5dd65e889163e723df1c2f02288cc527a57785
  8. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <ec583e300aee9f152a64911445092d18e1c36729
  9. Affected versionversion=796bcae7361c28cf825780f6f1aac9dd3411394e <fe6fe64403710287f0ae61a516954d8a4f7c9e3f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=796bcae7361c28cf825780f6f1aac9dd3411394e <0334d23c56ecf1ee1563bb83e29cc5a51ed7fb4e; version=796bcae7361c28cf825780f6f1aac9dd3411394e <0fc62bbc95319bbd330e3645afc7c286acec9ef8; version=796bcae7361c28cf825780f6f1aac9dd3411394e <403132881e66db7aa98b55c6655daedd80d407fd; version=796bcae7361c28cf825780f6f1aac9dd3411394e <40a959d7042bb7711e404ad2318b30e9f92c6b9b; version=796bcae7361c28cf825780f6f1aac9dd3411394e <c5c5bd5cdcc6dc9f75f53d1c89af463d39a2bb96; version=796bcae7361c28cf825780f6f1aac9dd3411394e <cb5dd65e889163e723df1c2f02288cc527a57785; version=796bcae7361c28cf825780f6f1aac9dd3411394e <ec583e300aee9f152a64911445092d18e1c36729; version=796bcae7361c28cf825780f6f1aac9dd3411394e <fe6fe64403710287f0ae61a516954d8a4f7c9e3f

Published CVSS scores

5.5CanonicalCVSS: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

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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