Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 ACPI Processor acpi_processor_driver_init initialization

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00+

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 and classified as very critical. This impacts the function acpi_processor_driver_init of the component ACPI Processor. Performing a manipulation results in initialization. This vulnerability is cataloged as CVE-2026-90364. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. This affects the function acpi_processor_driver_init of the component ACPI Processor. The manipulation with an unknown input leads to a initialization vulnerability. CWE is classifying the issue as CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-90364 since 09/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/17/2026).

Upgrading to version 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch ccee0785030978c49505e04954eee3f30a5f01ca/8f3036c5de8b651880f323e223b1604b6cfbff21/64976f3b34b07eb866ead4052cefe7e9ff45fd2f/182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892/06f32dd67e6b23a05bef0d8183c5335af91c0c3b is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: ccee0785030978c49505e04954eee3f30a5f01ca/8f3036c5de8b651880f323e223b1604b6cfbff21/64976f3b34b07eb866ead4052cefe7e9ff45fd2f/182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892/06f32dd67e6b23a05bef0d8183c5335af91c0c3b

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90364 (🔒)
GCVE (CVE): GCVE-0-2026-90364
GCVE (VulDB): GCVE-100-406899

Entryinfo

Created: 09/17/2026 21:53
Changes: 09/17/2026 21:53 (59)
Complete: 🔍
Cache ID: 216::103

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