{"id":"CVE-2026-43122","summary":"ACPI: processor: Update cpuidle driver check in __acpi_processor_start()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Update cpuidle driver check in __acpi_processor_start()\n\nCommit 7a8c994cbb2d (\"ACPI: processor: idle: Optimize ACPI idle\ndriver registration\") moved the ACPI idle driver registration to\nacpi_processor_driver_init() and acpi_processor_power_init() does\nnot register an idle driver any more.\n\nAccordingly, the cpuidle driver check in __acpi_processor_start() needs\nto be updated to avoid calling acpi_processor_power_init() without a\ncpuidle driver, in which case the registration of the cpuidle device\nin that function would lead to a NULL pointer dereference in\n__cpuidle_register_device().","modified":"2026-07-08T08:02:14.868711736Z","published":"2026-05-06T11:27:08.893Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43122.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43122.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43122"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7a8c994cbb2db3c5335cee35fd486557f5aaf7e1"},{"fixed":"68f38f648e4b5bed2aeadd2f711e25302e6490f8"},{"fixed":"6cfed39c2ce64ac024bbde458a9727105e0b8c66"},{"fixed":"0089ce1c056aee547115bdc25c223f8f88c08498"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43122.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43122.json"}}],"schema_version":"1.7.5"}