CVE-2025-40076

Description

In the Linux kernel, the following vulnerability has been resolved:PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()Starting with commit dd26c1a23fd5 (PCI: rcar-host: Switch tomsi_create_parent_irq_domain()), the MSI parent IRQ domain is null becausethe object of type struct irq_domain_info passed to:msi_create_parent_irq_domain() -> irq_domain_instantiate()() -> __irq_domain_instantiate()has no reference to the parent IRQ domain. Using msi->domain->parent as anargument for generic_handle_domain_irq() leads to below error:Unable to handle kernel null pointer dereference at virtual addressThis error was identified while switching the upcoming RZ/G3S PCIe hostcontroller driver to msi_create_parent_irq_domain() (which was using asimilar pattern to handle MSIs (see link section)), but it was not testedon hardware using the pcie-rcar-host controller driver due to lack ofhardware.[mani: reworded subject and description]

Risk Information

Base Score

5.5

MODERATE

Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Score

Exploitation Probability

0.026

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234