CVE-2023-52876

Kernel crash via unchecked clock-data allocation failure

Published May 21, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux's MT7629 Ethernet clock driver allows local users to crash the kernel during driver initialization. The two MT7629 Ethernet clock initialization paths failed to reject NULL results from mtk_alloc_clk_data before passing them to clock registration. Reachability requires the MT7629 driver and an allocation failure during probe; the resulting dereference can halt the host.

CVSS severity5.5
Medium
EPSS probability0.22%
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's MT7629 Ethernet clock driver allows local users to crash the kernel during driver initialization. The two MT7629 Ethernet clock initialization paths failed to reject NULL results from mtk_alloc_clk_data before passing them to clock registration. Reachability requires the MT7629 driver and an allocation failure during probe; the resulting dereference can halt the host.

The record

CVE
CVE-2023-52876
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
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=3b5e748615e714711220b2a95d19bd25a037db09 <0884393c63cc9a1772f7121a6645ba7bd76feeb9
  2. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <1639072f6260babd017556e9f236ca2ad589d1e7
  3. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <96e9544a0c4faca616b3f9f4034dcd83a14e7f22
  4. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <a540ca0aeae83c2f3964bcb4e383f64ce2ec1783
  5. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <b20cfe007a46f8c165d42a05c50a8d3d893e6592
  6. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <c4070ada5d5155c8d4d17ea64bd246949889f25b
  7. Affected versionversion=3b5e748615e714711220b2a95d19bd25a037db09 <cfa68e0ac5dcde43577adadf6f0f26f3b365ad68
  8. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3b5e748615e714711220b2a95d19bd25a037db09 <0884393c63cc9a1772f7121a6645ba7bd76feeb9; version=3b5e748615e714711220b2a95d19bd25a037db09 <1639072f6260babd017556e9f236ca2ad589d1e7; version=3b5e748615e714711220b2a95d19bd25a037db09 <96e9544a0c4faca616b3f9f4034dcd83a14e7f22; version=3b5e748615e714711220b2a95d19bd25a037db09 <a540ca0aeae83c2f3964bcb4e383f64ce2ec1783; version=3b5e748615e714711220b2a95d19bd25a037db09 <b20cfe007a46f8c165d42a05c50a8d3d893e6592; version=3b5e748615e714711220b2a95d19bd25a037db09 <c4070ada5d5155c8d4d17ea64bd246949889f25b; version=3b5e748615e714711220b2a95d19bd25a037db09 <cfa68e0ac5dcde43577adadf6f0f26f3b365ad68; version=5.0

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

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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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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