CVE-2023-53483

System crash via unchecked ACPI name allocation

Published Oct 1, 2025 · Updated Oct 1, 2025

NULL pointer dereference in Linux kernel 5.17 through 6.1.29 and 6.2 through 6.3.3 allows local users to crash the system. In fch_misc_setup(), a failed devm_kzalloc() leaves clk_data->name null, yet strcpy() later uses it as the destination. Reaching the fault requires low-privileged local access and the ACPI path that consumes the firmware clk-name property; the result is a kernel crash without reported data disclosure or modification.

CVSS severity6.8
Medium
EPSS probability0.15%
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 kernel 5.17 through 6.1.29 and 6.2 through 6.3.3 allows local users to crash the system. In fch_misc_setup(), a failed devm_kzalloc() leaves clk_data->name null, yet strcpy() later uses it as the destination. Reaching the fault requires low-privileged local access and the ACPI path that consumes the firmware clk-name property; the result is a kernel crash without reported data disclosure or modification.

The record

CVE
CVE-2023-53483
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dea41775d951ff1f7b472a346a8ca3ae7e74455
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <79ca94bc3e8cc3befa883c7d30b30a27ef0ea386
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a632ff6a2bea49993002b4c46092a2aea625840

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dea41775d951ff1f7b472a346a8ca3ae7e74455; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <79ca94bc3e8cc3befa883c7d30b30a27ef0ea386; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a632ff6a2bea49993002b4c46092a2aea625840

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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-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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