CVE-2023-53592

Service interruption via leaked GPIO node references

Published Oct 4, 2025 · Updated Oct 4, 2025

Resource leak in Linux kernel 5.6 through 6.2-rc2 allows local users to interrupt service by repeatedly probing the SiFive GPIO driver. The sifive_gpio_probe function retains the reference returned by of_irq_find_parent because it omits of_node_put after the parent node is no longer needed. Exploitation requires low-privilege local access and SiFive GPIO hardware that invokes this probe path, and it depletes resources without affecting confidentiality or integrity.

CVSS severity5.5
Medium
EPSS probability0.15%
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 Linux kernel 5.6 through 6.2-rc2 allows local users to interrupt service by repeatedly probing the SiFive GPIO driver. The sifive_gpio_probe function retains the reference returned by of_irq_find_parent because it omits of_node_put after the parent node is no longer needed. Exploitation requires low-privilege local access and SiFive GPIO hardware that invokes this probe path, and it depletes resources without affecting confidentiality or integrity.

The record

CVE
CVE-2023-53592
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 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=5.6
  2. Affected versionversion=96868dce644d002383f6d5eb575a6ce3c8779f39 <694175cd8a1643cde3acb45c9294bca44a8e08e9
  3. Affected versionversion=96868dce644d002383f6d5eb575a6ce3c8779f39 <95da1882ce9372ba20278f87cdb7a34f9812c4b5
  4. Affected versionversion=96868dce644d002383f6d5eb575a6ce3c8779f39 <9a402a210798662b04cbe6ca466e916a15efa03a
  5. Affected versionversion=96868dce644d002383f6d5eb575a6ce3c8779f39 <f4a2ad1002006548e235255c65a4f1d07312be9d
  6. Affected versionversion=96868dce644d002383f6d5eb575a6ce3c8779f39 <f9fb4776ebbc16dfc512adbdc0fe218acb47c7cc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=96868dce644d002383f6d5eb575a6ce3c8779f39 <694175cd8a1643cde3acb45c9294bca44a8e08e9; version=96868dce644d002383f6d5eb575a6ce3c8779f39 <95da1882ce9372ba20278f87cdb7a34f9812c4b5; version=96868dce644d002383f6d5eb575a6ce3c8779f39 <9a402a210798662b04cbe6ca466e916a15efa03a; version=96868dce644d002383f6d5eb575a6ce3c8779f39 <f4a2ad1002006548e235255c65a4f1d07312be9d; version=96868dce644d002383f6d5eb575a6ce3c8779f39 <f9fb4776ebbc16dfc512adbdc0fe218acb47c7cc

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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