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CVE-2022-49714: irqchip/realtek-rtl: Fix refcount leak in map_interrupts

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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/realtek-rtl: Fix refcount leak in map_interrupts of_find_node_by_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. This function doesn't call of_node_put() in error path. Call of_node_put() directly after of_property_read_u32() to cover both normal path and error path.

Affected products

• Linux kernel: from 5.12 before 5.15.49; from 5.16 before 5.18.6; 5.19-rc1, 5.19-rc2 — fixed in 5.15.49, 5.18.6

How to fix

Upgrade to a fixed version: Linux kernel 5.15.49, 5.18.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/e85b1b797de0e7a271b906291ce28245822820b8
• https://git.kernel.org/stable/c/eff4780f83d0ae3e5b6c02ff5d999dc4c1c5c8ce
• https://git.kernel.org/stable/c/f6d6223df0666fbc054e3a8c6ac14eb0af37c286

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