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CVE-2022-50104: powerpc/xive: Fix refcount leak in xive_get_max_prio

• 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: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: Fix refcount leak in xive_get_max_prio of_find_node_by_path() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. Add missing of_node_put() to avoid refcount leak.

Affected products

• Linux kernel: from 4.14 before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.137; from 5.11 before 5.15.61; from 5.16 before 5.18.18 — fixed in 4.14.291, 4.19.256, 5.10.137, 5.15.61, 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 5.10.137, 5.15.61. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/255b650cbec6849443ce2e0cdd187fd5e61c218c
• https://git.kernel.org/stable/c/2e18b869a8d574cfe9ee64df9c3d0a7ac7ed07a8
• https://git.kernel.org/stable/c/5ed9709d262bf026b2ff64979fbfe0f496287588
• https://git.kernel.org/stable/c/6d1e53f7f181a11a8a343def1e0d0209905b7c64
• https://git.kernel.org/stable/c/79b8eae24b7ee157bda07695d802be8576983fa8
• https://git.kernel.org/stable/c/d99733ad47a6c990b52e136608455643bfa708f2
• https://git.kernel.org/stable/c/ea494e8a9852abd0ba60f69b254ce0d7c38449e2
• https://git.kernel.org/stable/c/f658d5b528ce97a68efbb64ee54f6fe0909b189a

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