5.5

CVE-2026-43122

ACPI: processor: Update cpuidle driver check in __acpi_processor_start()

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

ACPI: processor: Update cpuidle driver check in __acpi_processor_start()

Commit 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle
driver registration") moved the ACPI idle driver registration to
acpi_processor_driver_init() and acpi_processor_power_init() does
not register an idle driver any more.

Accordingly, the cpuidle driver check in __acpi_processor_start() needs
to be updated to avoid calling acpi_processor_power_init() without a
cpuidle driver, in which case the registration of the cpuidle device
in that function would lead to a NULL pointer dereference in
__cpuidle_register_device().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.18 < 6.18.14
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.032
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8
Patch
https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66
Patch
https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498
Patch