CVE-2023-52861

Kernel crash via disconnected IT66121 connector dereference

Published May 21, 2024 · Updated May 11, 2026

NULL pointer dereference in the IT66121 DRM bridge driver in Linux allows local users to crash the kernel by opening its sound card. The it66121_audio_get_eld() callback dereferences a missing connector while fetching ELD data instead of returning an all-zero buffer. The IT66121 driver must be present, no monitor must be attached, and opening the associated sound device can terminate kernel operation.

CVSS severity6.2
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

NULL pointer dereference in the IT66121 DRM bridge driver in Linux allows local users to crash the kernel by opening its sound card. The it66121_audio_get_eld() callback dereferences a missing connector while fetching ELD data instead of returning an all-zero buffer. The IT66121 driver must be present, no monitor must be attached, and opening the associated sound device can terminate kernel operation.

The record

CVE
CVE-2023-52861
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

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=5.19
  2. Affected versionversion=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <1374561a7cbc9a000b77bb0473bb2c19daf18d86
  3. Affected versionversion=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <1669d7b21a664aa531856ce85b01359a376baebc
  4. Affected versionversion=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <2c80c4f0d2845645f41cbb7c9304c8efbdbd4331
  5. Affected versionversion=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <d0375f6858c4ff7244b62b02eb5e93428e1916cd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <1374561a7cbc9a000b77bb0473bb2c19daf18d86; version=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <1669d7b21a664aa531856ce85b01359a376baebc; version=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <2c80c4f0d2845645f41cbb7c9304c8efbdbd4331; version=e0fd83dbe92426e4f09b01111d260d2a7dc72fdb <d0375f6858c4ff7244b62b02eb5e93428e1916cd
The Linux Kernel Organization · Linux Kernelversion=5.19; version=e0fd83dbe924

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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