{"api_version":"1","generated_at":"2026-07-24T18:27:57+00:00","cve":"CVE-2026-43313","urls":{"html":"https://cve.report/CVE-2026-43313","api":"https://cve.report/api/cve/CVE-2026-43313.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43313","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43313"},"summary":{"title":"ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()\n\nIn acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE\ndevice and then reassigned an ISA device:\n\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...);\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);\n\nIf the first lookup succeeds but the second fails, dev becomes NULL. This\nleads to a potential null-pointer dereference when dev_dbg() is called:\n\n  if (errata.piix4.bmisx)\n    dev_dbg(&dev->dev, ...);\n\nTo prevent this, use two temporary pointers and retrieve each device\nindependently, avoiding overwriting dev with a possible NULL value.\n\n[ rjw: Subject adjustment, added an empty code line ]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 14:16:39","updated_at":"2026-05-15 17:09:58"},"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/0398b641be2b66c2fc7e0163c606ef19372e7ad5","name":"https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6","name":"https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf","name":"https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05","name":"https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5","name":"https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033","name":"https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254","name":"https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43313","name":"CVE 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the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()\n\nIn acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE\ndevice and then reassigned an ISA device:\n\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...);\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);\n\nIf the first lookup succeeds but the second fails, dev becomes NULL. This\nleads to a potential null-pointer dereference when dev_dbg() is called:\n\n  if (errata.piix4.bmisx)\n    dev_dbg(&dev->dev, ...);\n\nTo prevent this, use two temporary pointers and retrieve each device\nindependently, avoiding overwriting dev with a possible NULL value.\n\n[ rjw: Subject adjustment, added an empty code line ]"}],"providerMetadata":{"dateUpdated":"2026-05-11T22:22:08.644Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5"},{"url":"https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254"},{"url":"https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf"},{"url":"https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033"},{"url":"https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05"},{"url":"https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5"},{"url":"https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6"}],"title":"ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43313","datePublished":"2026-05-08T13:11:30.386Z","dateReserved":"2026-05-01T14:12:56.001Z","dateUpdated":"2026-05-11T22:22:08.644Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 14:16:39","lastModifiedDate":"2026-05-15 17:09:58","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":"2.6.12.1","versionEndExcluding":"5.15.202","matchCriteriaId":"13FF04FC-408D-490E-93F8-68442FA765B0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.165","matchCriteriaId":"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.128","matchCriteriaId":"851E9353-6C09-4CC9-877E-E09DB164A3C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.75","matchCriteriaId":"BCE16369-98ED-41CF-8995-DFDC10B288D2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.16","matchCriteriaId":"B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.6","matchCriteriaId":"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*","matchCriteriaId":"6F62EECE-8FB1-4D57-85D8-CB9E23CF313C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*","matchCriteriaId":"4F76C298-81DC-43E4-8FC9-DC005A2116EF"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*","matchCriteriaId":"0AB349B2-3F78-4197-882B-90ADB3BF645A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*","matchCriteriaId":"6AC88830-A9BC-4607-B572-A4B502FC9FD0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*","matchCriteriaId":"476CB3A5-D022-4F13-AAEF-CB6A5785516A"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43313","Ordinal":"1","Title":"ACPI: processor: Fix NULL-pointer dereference in acpi_processor_","CVE":"CVE-2026-43313","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43313","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()\n\nIn acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE\ndevice and then reassigned an ISA device:\n\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...);\n  dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);\n\nIf the first lookup succeeds but the second fails, dev becomes NULL. This\nleads to a potential null-pointer dereference when dev_dbg() is called:\n\n  if (errata.piix4.bmisx)\n    dev_dbg(&dev->dev, ...);\n\nTo prevent this, use two temporary pointers and retrieve each device\nindependently, avoiding overwriting dev with a possible NULL value.\n\n[ rjw: Subject adjustment, added an empty code line ]","Type":"Description","Title":"ACPI: processor: Fix NULL-pointer dereference in acpi_processor_"}]}}}