Vulnerability Description
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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.18, < 6.18.14 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498Patch
- https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8Patch
- https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66Patch
FAQ
What is CVE-2026-43122?
CVE-2026-43122 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ACP...
How severe is CVE-2026-43122?
CVE-2026-43122 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43122?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.