CVE-2026-90364
ACPI: processor: Unregister cpufreq notifier on init failure
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.
INFO
Published Date :
Sept. 17, 2026, 5:17 p.m.
Last Modified :
Sept. 17, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Mirror module exit path on init failure.
- Unregister cpufreq notifier on init failure.
- Ensure proper resource cleanup during initialization.
- Apply relevant kernel patches.
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2026-90364.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-90364 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-90364
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-90364 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-90364 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90364.json">CVE-2026-90364</a> Added Reference https://git.kernel.org/stable/c/06f32dd67e6b23a05bef0d8183c5335af91c0c3b Added Reference https://git.kernel.org/stable/c/182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892 Added Reference https://git.kernel.org/stable/c/64976f3b34b07eb866ead4052cefe7e9ff45fd2f Added Reference https://git.kernel.org/stable/c/8f3036c5de8b651880f323e223b1604b6cfbff21 Added Reference https://git.kernel.org/stable/c/ccee0785030978c49505e04954eee3f30a5f01ca