What’s Vulnerable › Vulnerabilities

CVE-2026-74491: of/address: Fix NULL bus dereference in of_pci_range_parser_one()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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.

Affected products

• Linux kernel: 6.13 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-74491 or the next vulnerability affects your stack