{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43122","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.987Z","datePublished":"2026-05-06T11:27:08.893Z","dateUpdated":"2026-05-11T22:18:10.935Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:18:10.935Z"},"descriptions":[{"lang":"en","value":"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()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/processor_driver.c"],"versions":[{"version":"7a8c994cbb2db3c5335cee35fd486557f5aaf7e1","lessThan":"68f38f648e4b5bed2aeadd2f711e25302e6490f8","status":"affected","versionType":"git"},{"version":"7a8c994cbb2db3c5335cee35fd486557f5aaf7e1","lessThan":"6cfed39c2ce64ac024bbde458a9727105e0b8c66","status":"affected","versionType":"git"},{"version":"7a8c994cbb2db3c5335cee35fd486557f5aaf7e1","lessThan":"0089ce1c056aee547115bdc25c223f8f88c08498","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/processor_driver.c"],"versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","status":"unaffected","versionType":"semver"},{"version":"6.18.14","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.4","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"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"}}}}