CVE-2026-90364
Published Sep 17, 2026
Description
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.
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References
Other References
https://git.kernel.org/stable/c/06f32dd67e6b23a05bef0d8183c5335af91c0c3b
https://git.kernel.org/stable/c/182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892
https://git.kernel.org/stable/c/64976f3b34b07eb866ead4052cefe7e9ff45fd2f
https://git.kernel.org/stable/c/8f3036c5de8b651880f323e223b1604b6cfbff21
https://git.kernel.org/stable/c/ccee0785030978c49505e04954eee3f30a5f01ca
Frequently Asked Questions
What is CVE-2026-90364? +
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.
How do I check if I'm vulnerable to CVE-2026-90364? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.