CVE-2026-74491

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/88752b811f72aa7a16de6dad4b25031d7308673e
• https://git.kernel.org/stable/c/eddd0159a8761a16a9d183676b03cf493417816e
• https://git.kernel.org/stable/c/bba13ad17b1a11b3f1ed9b3a5d556191d7755a59

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