{"api_version":"1","generated_at":"2026-05-13T22:46:18+00:00","cve":"CVE-2026-43122","urls":{"html":"https://cve.report/CVE-2026-43122","api":"https://cve.report/api/cve/CVE-2026-43122.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43122","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43122"},"summary":{"title":"ACPI: processor: Update cpuidle driver check in __acpi_processor_start()","description":"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().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 12:16:29","updated_at":"2026-05-12 21:17:44"},"problem_types":["CWE-476"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66","name":"https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8","name":"https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498","name":"https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43122","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43122","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a8c994cbb2db3c5335cee35fd486557f5aaf7e1 68f38f648e4b5bed2aeadd2f711e25302e6490f8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a8c994cbb2db3c5335cee35fd486557f5aaf7e1 6cfed39c2ce64ac024bbde458a9727105e0b8c66 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7a8c994cbb2db3c5335cee35fd486557f5aaf7e1 0089ce1c056aee547115bdc25c223f8f88c08498 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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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()."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:18:10.935Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8"},{"url":"https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66"},{"url":"https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498"}],"title":"ACPI: processor: Update cpuidle driver check in __acpi_processor_start()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43122","datePublished":"2026-05-06T11:27:08.893Z","dateReserved":"2026-05-01T14:12:55.987Z","dateUpdated":"2026-05-11T22:18:10.935Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 12:16:29","lastModifiedDate":"2026-05-12 21:17:44","problem_types":["CWE-476"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.14","matchCriteriaId":"3E0E101B-8972-4E77-80E0-D97AC3CA57C1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.4","matchCriteriaId":"672A3E79-EC03-479D-8503-361DFBDC8092"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43122","Ordinal":"1","Title":"ACPI: processor: Update cpuidle driver check in __acpi_processor","CVE":"CVE-2026-43122","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43122","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"ACPI: processor: Update cpuidle driver check in __acpi_processor"}]}}}