CVE-2023-53483: ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-01 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup() devm_kzalloc() may fail, clk_data->name might be NULL and will cause a NULL pointer dereference later. [ rjw: Subject and changelog edits ]

Affected products

Linux kernel: from 5.17 before 6.1.30; from 6.2 before 6.3.4 — fixed in 6.1.30, 6.3.4

How to fix

Upgrade to a fixed version: Linux kernel 6.1.30, 6.3.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/4dea41775d951ff1f7b472a346a8ca3ae7e74455
https://git.kernel.org/stable/c/79ca94bc3e8cc3befa883c7d30b30a27ef0ea386
https://git.kernel.org/stable/c/8a632ff6a2bea49993002b4c46092a2aea625840

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