{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43313","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.001Z","datePublished":"2026-05-08T13:11:30.386Z","dateUpdated":"2026-05-11T22:22:08.644Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:22:08.644Z"},"descriptions":[{"lang":"en","value":"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 ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpi_processor.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ad86ac604f8391c0212a91412d4f764c7a85f254","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"01e8751b37a366b1ca561add0042f2ceb18c03bf","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b803811485ac0b2f774b6bf3abc8b999ba3b7033","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"29f60d3d06818d40118a30d663231f027ae87a05","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0398b641be2b66c2fc7e0163c606ef19372e7ad5","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"f132e089fe89cadc2098991f0a3cb05c3f824ac6","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/acpi_processor.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.15.202","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.165","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.128","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.75","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.16","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.6","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":"2.6.12","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"7.0"}]}]}],"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"}}}}