{"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": "2026-05-06T11:27:08.893Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-06T11:27:08.893Z"}, "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"}}}}

{}

{"cveTags": [], "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()."}], "id": "CVE-2026-43122", "lastModified": "2026-05-06T13:07:51.607", "metrics": {}, "published": "2026-05-06T12:16:29.067", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ACPI: processor: Update cpuidle driver check in __acpi_processor_start()", "id": "2467129", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467129"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's Advanced Configuration and Power Interface (ACPI) cpuidle driver. Due to an update in the `__acpi_processor_start()` function, a NULL pointer dereference can occur if `acpi_processor_power_init()` is called without a cpuidle driver. This vulnerability could allow a local attacker to trigger a system crash, leading to a denial of service (DoS)."], "name": "CVE-2026-43122", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43122\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43122\nhttps://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43122-6d5d@gregkh/T"]}