CVE-2023-53191

Local service interruption via leaked node reference

Published Sep 15, 2025 · Updated Sep 15, 2025

Resource leak in the Linux kernel allows local users to interrupt service through Alpine MSI interrupt-domain initialization. The alpine_msix_init_domains function retains the reference returned by of_irq_find_parent because it omits the required of_node_put call. Reachability requires local low-privilege access on a system using the Alpine MSI interrupt controller; the public record does not describe a repeatable trigger.

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 Alpine MSI interrupt-domain initialization. The alpine_msix_init_domains function retains the reference returned by of_irq_find_parent because it omits the required of_node_put call. Reachability requires local low-privilege access on a system using the Alpine MSI interrupt controller; the public record does not describe a repeatable trigger.

The record

CVE
CVE-2023-53191
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=4.6
  2. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <071d068b89e95d1b078aa6bbcb9d0961b77d6aa1
  3. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <5fbf2cc39b62a4afe44f3d42ee3dcf8f012c1926
  4. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <65e30bd1310d90b794c377bf405394157854aa30
  5. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <9e79ac4f70fd51243e1c6108d4b0baf16cfde99c
  6. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <c9aaf4efe1f02b2fef21a69fb3652f5ad12a5710
  7. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <d6c66c46889752fa4962c6388516f7ab66a8d6a1
  8. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <eef04516f0c317ce80502c1d6b0d06235a87cd8f
  9. Affected versionversion=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <eef09f786df4b34b97557929287c4e5a83bbf09b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <071d068b89e95d1b078aa6bbcb9d0961b77d6aa1; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <5fbf2cc39b62a4afe44f3d42ee3dcf8f012c1926; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <65e30bd1310d90b794c377bf405394157854aa30; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <9e79ac4f70fd51243e1c6108d4b0baf16cfde99c; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <c9aaf4efe1f02b2fef21a69fb3652f5ad12a5710; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <d6c66c46889752fa4962c6388516f7ab66a8d6a1; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <eef04516f0c317ce80502c1d6b0d06235a87cd8f; version=e6b78f2c3e14a9e3a909be3e6ec305d9f1cbabbd <eef09f786df4b34b97557929287c4e5a83bbf09b

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 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

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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