CVE-2026-74491

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

of/address: Fix NULL bus dereference in of_pci_range_parser_one()

The bus matching rework made of_match_bus() return NULL for nodes with

ranges/dma-ranges but no local #address-cells. parser_init() stored that

NULL bus, and the range iterator later dereferenced it.

Reject such nodes in parser_init(), leaving an explicit empty

iterator for callers that ignore the init return, and make

of_dma_get_max_cpu_address() honour the init failure so a rejected node

cannot clamp the DMA limit.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References