CVE-2022-49717: irqchip/apple-aic: Fix refcount leak in build_fiq_affinity

Severity: medium (CVSS 5.5 v3.1)
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: 2025-02-26 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: irqchip/apple-aic: Fix refcount leak in build_fiq_affinity of_find_node_by_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak.

Affected products

Linux kernel: from 5.18 before 5.18.6; 5.19-rc1, 5.19-rc2 — fixed in 5.18.6

How to fix

Upgrade to a fixed version: Linux kernel 5.18.6. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2dc14cebe5dc053434b507bb24e6821cb795050f
https://git.kernel.org/stable/c/b1ac803f47cb1615468f35cf1ccb553c52087301

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