CVE-2023-52693

Service interruption via uninitialized ACPI parent handle

Published May 17, 2024 · Updated May 11, 2026

Improper error handling in the Linux kernel allows local users to interrupt service during ACPI video backlight registration. acpi_video_dev_register_backlight passes an uninitialized acpi_parent handle to acpi_get_pci_dev when acpi_get_parent fails. Exploitation requires local low-privileged access and an ACPI parent lookup failure; confidentiality and integrity effects are not reported.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper error handling in the Linux kernel allows local users to interrupt service during ACPI video backlight registration. acpi_video_dev_register_backlight passes an uninitialized acpi_parent handle to acpi_get_pci_dev when acpi_get_parent fails. Exploitation requires local low-privileged access and an ACPI parent lookup failure; confidentiality and integrity effects are not reported.

The record

CVE
CVE-2023-52693
Published
May 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 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=2.6.39
  2. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <1e3a2b9b4039bb4d136dca59fb31e06465e056f3
  3. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <2124c5bc22948fc4d09a23db4a8acdccc7d21e95
  4. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <39af144b6d01d9b40f52e5d773e653957e6c379c
  5. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <3a370502a5681986f9828e43be75ce26c6ab24af
  6. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <556f02699d33c1f40b1b31bd25828ce08fa165d8
  7. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <72884ce4e10417b1233b614bf134da852df0f15f
  8. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <c4e1a0ef0b4782854c9b77a333ca912b392bed2f
  9. Affected versionversion=9661e92c10a9775243c1ecb73373528ed8725a10 <ccd45faf4973746c4f30ea41eec864e5cf191099

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.39; version=9661e92c10a9775243c1ecb73373528ed8725a10 <1e3a2b9b4039bb4d136dca59fb31e06465e056f3; version=9661e92c10a9775243c1ecb73373528ed8725a10 <2124c5bc22948fc4d09a23db4a8acdccc7d21e95; version=9661e92c10a9775243c1ecb73373528ed8725a10 <39af144b6d01d9b40f52e5d773e653957e6c379c; version=9661e92c10a9775243c1ecb73373528ed8725a10 <3a370502a5681986f9828e43be75ce26c6ab24af; version=9661e92c10a9775243c1ecb73373528ed8725a10 <556f02699d33c1f40b1b31bd25828ce08fa165d8; version=9661e92c10a9775243c1ecb73373528ed8725a10 <72884ce4e10417b1233b614bf134da852df0f15f; version=9661e92c10a9775243c1ecb73373528ed8725a10 <c4e1a0ef0b4782854c9b77a333ca912b392bed2f; version=9661e92c10a9775243c1ecb73373528ed8725a10 <ccd45faf4973746c4f30ea41eec864e5cf191099

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.

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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