CVE-2026-90364

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc0e0421a60bf468e88cf569fbd727346b138ed04 < ccee0785030978c49505e04954eee3f30a5f01caaffected
LinuxLinuxc0e0421a60bf468e88cf569fbd727346b138ed04 < 8f3036c5de8b651880f323e223b1604b6cfbff21affected
LinuxLinuxc0e0421a60bf468e88cf569fbd727346b138ed04 < 64976f3b34b07eb866ead4052cefe7e9ff45fd2faffected
LinuxLinuxc0e0421a60bf468e88cf569fbd727346b138ed04 < 182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892affected
LinuxLinuxc0e0421a60bf468e88cf569fbd727346b138ed04 < 06f32dd67e6b23a05bef0d8183c5335af91c0c3baffected
LinuxLinux6.3affected
LinuxLinux0 < 6.3unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References