CVE-2023-52627

Local denial of service via unset event callbacks

Published Mar 26, 2024 · Updated May 11, 2026

Null pointer dereference in affected Linux kernel releases allows local users to interrupt availability through AD7091R-5 event configuration. The AD7091R-5 IIO event specification exposes threshold and enable operations while its handler callback pointers remain unset, so configuration dereferences a null pointer. Exploitation requires local low-privileged access and an AD7091R-5 device; the documented consequence is limited to kernel availability.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in affected Linux kernel releases allows local users to interrupt availability through AD7091R-5 event configuration. The AD7091R-5 IIO event specification exposes threshold and enable operations while its handler callback pointers remain unset, so configuration dereferences a null pointer. Exploitation requires local low-privileged access and an AD7091R-5 device; the documented consequence is limited to kernel availability.

The record

CVE
CVE-2023-52627
Published
Mar 26, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 26, 2024CVE 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=5.6
  2. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <020e71c7ffc25dfe29ed9be6c2d39af7bd7f661f
  3. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <137568aa540a9f587c48ff7d4c51cdba08cfe9a4
  4. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <1eba6f7ffa295a0eec098c107043074be7cc4ec5
  5. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <49f322ce1f265935f15e5512da69a399f27a5091
  6. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <55aca2ce91a63740278502066beaddbd841af9c6
  7. Affected versionversion=ca69300173b642ba64118200172171ea5967b6c5 <89c4e63324e208a23098f7fb15c00487cecbfed2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=ca69300173b642ba64118200172171ea5967b6c5 <020e71c7ffc25dfe29ed9be6c2d39af7bd7f661f; version=ca69300173b642ba64118200172171ea5967b6c5 <137568aa540a9f587c48ff7d4c51cdba08cfe9a4; version=ca69300173b642ba64118200172171ea5967b6c5 <1eba6f7ffa295a0eec098c107043074be7cc4ec5; version=ca69300173b642ba64118200172171ea5967b6c5 <49f322ce1f265935f15e5512da69a399f27a5091; version=ca69300173b642ba64118200172171ea5967b6c5 <55aca2ce91a63740278502066beaddbd841af9c6; version=ca69300173b642ba64118200172171ea5967b6c5 <89c4e63324e208a23098f7fb15c00487cecbfed2

Published CVSS scores

5.5CISA-ADPCVSS: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

T1499Endpoint Denial of Service

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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