CVE-2025-23140

IRQ resource leak via incomplete request failure cleanup

Published May 1, 2025 · Updated May 11, 2026

Resource cleanup error in the Linux pci_endpoint_test driver 4.19 and later leaves IRQ entries allocated after an interrupt request fails. The failure path in pci_endpoint_test_request_irq() calls pci_endpoint_test_free_irq_vectors() as though every requested IRQ had been released, leaving /proc/irq entries and triggering a WARN during cleanup. The condition requires the PCI endpoint test driver, a configured endpoint device, and a devm_request_irq() failure; published evidence reports a warning and resource leak, not privilege gain or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource cleanup error in the Linux pci_endpoint_test driver 4.19 and later leaves IRQ entries allocated after an interrupt request fails. The failure path in pci_endpoint_test_request_irq() calls pci_endpoint_test_free_irq_vectors() as though every requested IRQ had been released, leaving /proc/irq entries and triggering a WARN during cleanup. The condition requires the PCI endpoint test driver, a configured endpoint device, and a devm_request_irq() failure; published evidence reports a warning and resource leak, not privilege gain or code execution.

The record

CVE
CVE-2025-23140
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. May 1, 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=4.19
  2. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <0557e70e2aeba8647bf5a950820b67cfb86533db
  3. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <54c9f299ad7d7c4be5d271ed12d01a59e95b8907
  4. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <5a4b7181213268c9b07bef8800905528435db44a
  5. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <705be96504779e4a333ea042b4779ea941f0ace9
  6. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <770407f6173f4f39f4e2c1b54422b79ce6c98bdb
  7. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <9d5118b107b1a2353ed0dff24404aee2e6b7ca0a
  8. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <e516e187bf32d8decc7c7d0025ae4857cad13c0e
  9. Affected versionversion=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <f6cb7828c8e17520d4f5afb416515d3fae1af9a9

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <0557e70e2aeba8647bf5a950820b67cfb86533db; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <54c9f299ad7d7c4be5d271ed12d01a59e95b8907; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <5a4b7181213268c9b07bef8800905528435db44a; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <705be96504779e4a333ea042b4779ea941f0ace9; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <770407f6173f4f39f4e2c1b54422b79ce6c98bdb; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <9d5118b107b1a2353ed0dff24404aee2e6b7ca0a; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <e516e187bf32d8decc7c7d0025ae4857cad13c0e; version=e03327122e2c8e6ae4565ef5b3d3cbe4364546a1 <f6cb7828c8e17520d4f5afb416515d3fae1af9a9

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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