CVE-2026-43313None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4() In acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE device and th…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()
In acpi_processor_errata_piix4(), the pointer dev is first assigned an IDE device and then reassigned an ISA device:
dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB, ...); dev = pci_get_subsys(..., PCI_DEVICE_ID_INTEL_82371AB_0, ...);
If the first lookup succeeds but the second fails, dev becomes NULL. This leads to a potential null-pointer dereference when dev_dbg() is called:
if (errata.piix4.bmisx) dev_dbg(&dev->dev, ...);
To prevent this, use two temporary pointers and retrieve each device independently, avoiding overwriting dev with a possible NULL value.
[ rjw: Subject adjustment, added an empty code line ]
Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ad86ac604f8391c0212a91412d4f764c7a85f254Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 01e8751b37a366b1ca561add0042f2ceb18c03bfLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b803811485ac0b2f774b6bf3abc8b999ba3b7033Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 29f60d3d06818d40118a30d663231f027ae87a05Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0398b641be2b66c2fc7e0163c606ef19372e7ad5Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f132e089fe89cadc2098991f0a3cb05c3f824ac6Linux 2.6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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