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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-43313

ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()CVE-2026-43313

Answer in brief

CVE-2026-43313 records a Unknown severity vulnerability in ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 8, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 6, 2026
References
7 linked sources
Open source record

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ad86ac604f8391c0212a91412d4f764c7a85f254 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <01e8751b37a366b1ca561add0042f2ceb18c03bf || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b803811485ac0b2f774b6bf3abc8b999ba3b7033 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <29f60d3d06818d40118a30d663231f027ae87a05 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0398b641be2b66c2fc7e0163c606ef19372e7ad5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f132e089fe89cadc2098991f0a3cb05c3f824ac606724a60cfa9767ea90b0f5d3dfb5cdd251b64f5, ad86ac604f8391c0212a91412d4f764c7a85f254, 01e8751b37a366b1ca561add0042f2ceb18c03bf, b803811485ac0b2f774b6bf3abc8b999ba3b7033, 29f60d3d06818d40118a30d663231f027ae87a05, 0398b641be2b66c2fc7e0163c606ef19372e7ad5, f132e089fe89cadc2098991f0a3cb05c3f824ac6
Linux/Linuxgeneric2.6.12Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

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 ]

Quoted source text, attributed separately from HOL analysis.