CVE-2026-43313

MEDIUM EPSS 2.4%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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 ]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥2.6.12.1  –  <5.15.202
linuxlinux_kernel*≥5.16  –  <6.1.165
linuxlinux_kernel*≥6.2  –  <6.6.128
linuxlinux_kernel*≥6.7  –  <6.12.75
linuxlinux_kernel*≥6.13  –  <6.18.16
linuxlinux_kernel*≥6.19  –  <6.19.6
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/01e8751b37a366b1ca561add0042f2ceb18c03bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0398b641be2b66c2fc7e0163c606ef19372e7ad5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/29f60d3d06818d40118a30d663231f027ae87a05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad86ac604f8391c0212a91412d4f764c7a85f254
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b803811485ac0b2f774b6bf3abc8b999ba3b7033
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f132e089fe89cadc2098991f0a3cb05c3f824ac6
    Patch