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CVE-2026-98504

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
Linux•Linux•Versions : <=6.12.*, 6.18.55, 0, <6.6, 6.12.112, 6.6.158, <=6.6.*, <879c911f77b8a7862aa16079b04efc3fdc5d32ec, 6.6, <aee774588abd78f75952fd34c3fa461bc46b62c2, <=6.18.*, <a6d97d10e49ae49026ae13af6c41634fce470a37, <=7.2.*, <ccd32fa3489cbe86a0b281da4447b4c7eadb3518, 7.2.9, 407d1a51921e9f28c1bcec647c2205925bd1fdab, <=*, <8805840aad73df7146778be243a196d48b4f6430, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: of_property: Omit bus properties without a subordinate bus A bridge (a device with a Type 1 header) may not have a secondary bus allocated (pdev->subordinate), e.g., if there are no available bus numbers or the bridge secondary/subordinate bus numbers are not writable. The dynamic OF helpers of_pci_prop_bus_range() and of_pci_prop_intr_map() dereference pdev->subordinate without checking it. When CONFIG_PCI_DYNAMIC_OF_NODES is enabled, this can cause a NULL pointer dereference and early boot hang. Generate 'bus-range' and 'interrupt-map' properties only when a subordinate bus exists. Keep the node and its remaining properties for bridges without one. The problem was latent since 407d1a51921e ("PCI: Create device tree node for bridge"), but wasn't reachable until 1f340724419e ("PCI: of: Create device tree PCI host bridge node"), which appeared in v6.15. Before 1f340724419e, of_pci_make_dev_node() returned early because the parent OF node was missing. [bhelgaas: move pdev->subordinate test to callees, commit log]

Gravité et risque d'exploitation

CVE-2026-98504 obtient un score CVSS de 0.0/10, soit une gravité non évaluée.

Que faire ?

  • Vérifiez si Linux (versions <=6.12.*, 6.18.55, 0, <6.6, 6.12.112, 6.6.158, <=6.6.*, <879c911f77b8a7862aa16079b04efc3fdc5d32ec, 6.6, <aee774588abd78f75952fd34c3fa461bc46b62c2, <=6.18.*, <a6d97d10e49ae49026ae13af6c41634fce470a37, <=7.2.*, <ccd32fa3489cbe86a0b281da4447b4c7eadb3518, 7.2.9, 407d1a51921e9f28c1bcec647c2205925bd1fdab, <=*, <8805840aad73df7146778be243a196d48b4f6430, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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