CVE-2023-52866

Test-kernel crash via null HID device dereference

Published May 21, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux 6.3 through 6.5.11 and 6.6 through 6.6.1 causes a KUnit test kernel to crash during startup. The cleanup test passes a null HID device to uclogic_params_ugee_v2_init_event_hooks, whose battery check dereferences hdev->dev through hid_get_drvdata. The failure requires CONFIG_HID_UCLOGIC=y and CONFIG_KUNIT_ALL_TESTS=y and occurs in KUnit cleanup testing, with no reported trigger through normal HID input.

CVSS severity7.1
High
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 Linux 6.3 through 6.5.11 and 6.6 through 6.6.1 causes a KUnit test kernel to crash during startup. The cleanup test passes a null HID device to uclogic_params_ugee_v2_init_event_hooks, whose battery check dereferences hdev->dev through hid_get_drvdata. The failure requires CONFIG_HID_UCLOGIC=y and CONFIG_KUNIT_ALL_TESTS=y and occurs in KUnit cleanup testing, with no reported trigger through normal HID input.

The record

CVE
CVE-2023-52866
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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=6.3
  2. Affected versionversion=a251d6576d2a29fc0806ef4775719e3b6e672d91 <64da1f6147dac7f8499d4937a0d7ea990bf569e8
  3. Affected versionversion=a251d6576d2a29fc0806ef4775719e3b6e672d91 <6c8f953728d75104d994893f58801c457274335a
  4. Affected versionversion=a251d6576d2a29fc0806ef4775719e3b6e672d91 <91cfe0bbaa1c434d4271eb6e1d7aaa1fe8d121f6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=a251d6576d2a29fc0806ef4775719e3b6e672d91 <64da1f6147dac7f8499d4937a0d7ea990bf569e8; version=a251d6576d2a29fc0806ef4775719e3b6e672d91 <6c8f953728d75104d994893f58801c457274335a; version=a251d6576d2a29fc0806ef4775719e3b6e672d91 <91cfe0bbaa1c434d4271eb6e1d7aaa1fe8d121f6

Published CVSS scores

6.2SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

CWE-125Out-of-bounds Read

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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