CVE-2022-50311

Service interruption via CXL reference leak

Published Sep 15, 2025 · Updated Sep 15, 2025

Resource leak in the Linux kernel allows local users to interrupt service through failed PowerPC CXL routing calculations. The cxl_calc_capp_routing error path returns after get_phb_index fails without passing its referenced device-tree node to of_node_put. Reachability requires the PowerPC CXL driver and compatible accelerator hardware; repeated failures retain references until kernel resources are exhausted.

CVSS severity5.5
Medium
EPSS probability0.16%
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 allows local users to interrupt service through failed PowerPC CXL routing calculations. The cxl_calc_capp_routing error path returns after get_phb_index fails without passing its referenced device-tree node to of_node_put. Reachability requires the PowerPC CXL driver and compatible accelerator hardware; repeated failures retain references until kernel resources are exhausted.

The record

CVE
CVE-2022-50311
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=4.12
  2. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <1d09697ff22908ae487fc8c4fbde1811732be523
  3. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <2d7b6580384e6d65419933ddc525bd176095da54
  4. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <651e8bc9d0418c20a1989b7c078c64c2a6346fa3
  5. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <6a310e8db5409676b4b3e6c1f54dff174e4fd04d
  6. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <81c8bbf5b2b5f0c8030fff1716c00849cda8571a
  7. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <c9bebc503881c1391f6c4f820134884adecf1519
  8. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <ee870f72465015327ad96204b0e92450d04870cd
  9. Affected versionversion=f24be42aab37c6d07c05126673138e06223a6399 <f2d60f6ba173cded65081cee690b67802395a479

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=f24be42aab37c6d07c05126673138e06223a6399 <1d09697ff22908ae487fc8c4fbde1811732be523; version=f24be42aab37c6d07c05126673138e06223a6399 <2d7b6580384e6d65419933ddc525bd176095da54; version=f24be42aab37c6d07c05126673138e06223a6399 <651e8bc9d0418c20a1989b7c078c64c2a6346fa3; version=f24be42aab37c6d07c05126673138e06223a6399 <6a310e8db5409676b4b3e6c1f54dff174e4fd04d; version=f24be42aab37c6d07c05126673138e06223a6399 <81c8bbf5b2b5f0c8030fff1716c00849cda8571a; version=f24be42aab37c6d07c05126673138e06223a6399 <c9bebc503881c1391f6c4f820134884adecf1519; version=f24be42aab37c6d07c05126673138e06223a6399 <ee870f72465015327ad96204b0e92450d04870cd; version=f24be42aab37c6d07c05126673138e06223a6399 <f2d60f6ba173cded65081cee690b67802395a479

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

T1499.004Application 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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