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NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package perf6.18-debuginfo  (opens in a new tab)

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EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-AMZN2023-PERF618DEBUGINFO-16741376
  • published18 May 2026
  • disclosed8 May 2026
Report a new vulnerability Found a mistake?

Introduced: 8 May 2026

NewCVE-2026-43313  (opens in a new tab)
CWE-476  (opens in a new tab)

Amendment

The Amazon-Linux security team deemed this advisory irrelevant for Amazon-Linux:2023.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf6.18-debuginfo package and not the perf6.18-debuginfo package as distributed by Amazon-Linux.

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 ]