CVE-2026-90364 PUBLISHED

ACPI: processor: Unregister cpufreq notifier on init failure

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: Unregister cpufreq notifier on init failure

acpi_processor_driver_init() registers the cpufreq policy notifier before registering the ACPI processor driver and setting up CPU hotplug state.

If driver_register() or cpuhp_setup_state() fails, the error path only unregisters the ACPI processor driver and the idle driver. The cpufreq notifier remains registered even though initialization failed.

Mirror the module exit path on the init failure path and unregister the cpufreq notifier when it has been registered.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from c0e0421a60bf468e88cf569fbd727346b138ed04 to ccee0785030978c49505e04954eee3f30a5f01ca (excl.)
  • affected from c0e0421a60bf468e88cf569fbd727346b138ed04 to 8f3036c5de8b651880f323e223b1604b6cfbff21 (excl.)
  • affected from c0e0421a60bf468e88cf569fbd727346b138ed04 to 64976f3b34b07eb866ead4052cefe7e9ff45fd2f (excl.)
  • affected from c0e0421a60bf468e88cf569fbd727346b138ed04 to 182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892 (excl.)
  • affected from c0e0421a60bf468e88cf569fbd727346b138ed04 to 06f32dd67e6b23a05bef0d8183c5335af91c0c3b (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.3 is affected
  • unaffected from 0 to 6.3 (excl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References