Vulnerability-Lookup

FKIE_CVE-2026-43313

Vulnerability from fkie_nvd - Published: 2026-05-08 14:16 - Updated: 2026-05-15 17:09

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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 ]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12

JSON

To clipboard

{
  "configurations": [
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        {
          "cpeMatch": [
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      "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(\u0026dev-\u003edev, ...);\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 ]"
    }
  ],
  "id": "CVE-2026-43313",
  "lastModified": "2026-05-15T17:09:58.483",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2026-05-08T14:16:39.710",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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  ]
}

CVE-2026-43313 (GCVE-0-2026-43313)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-05-11 22:22

Title

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

Summary

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/06724a60cfa9767ea…
https://git.kernel.org/stable/c/ad86ac604f8391c02…
https://git.kernel.org/stable/c/01e8751b37a366b1c…
https://git.kernel.org/stable/c/b803811485ac0b2f7…
https://git.kernel.org/stable/c/29f60d3d06818d401…
https://git.kernel.org/stable/c/0398b641be2b66c2f…
https://git.kernel.org/stable/c/f132e089fe89cadc2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ad86ac604f8391c0212a91412d4f764c7a85f254 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 01e8751b37a366b1ca561add0042f2ceb18c03bf (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b803811485ac0b2f774b6bf3abc8b999ba3b7033 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 29f60d3d06818d40118a30d663231f027ae87a05 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0398b641be2b66c2fc7e0163c606ef19372e7ad5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f132e089fe89cadc2098991f0a3cb05c3f824ac6 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpi_processor.c"
          ],
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        },
        {
          "url": "https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6"
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      ],
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    "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43313

CVE-2026-43313 (GCVE-0-2026-43313)

Tags

Sightings

Nomenclature