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CVE-2022-49668: PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events

• 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: PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. This function only calls of_node_put() in normal path, missing it in error paths. Add missing of_node_put() to avoid refcount leak.

Affected products

• Linux kernel: from 4.0 before 5.4.204; from 5.5 before 5.10.129; from 5.11 before 5.15.53; from 5.16 before 5.18.10; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4 — fixed in 5.10.129, 5.15.53, 5.18.10, 5.4.204

How to fix

Upgrade to a fixed version: Linux kernel 5.10.129, 5.15.53, 5.18.10, 5.4.204. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/01121e39ef537289926ae6f5374dce92c796d863
• https://git.kernel.org/stable/c/194781229d4cbc804b8ded13156eb8addce87d6c
• https://git.kernel.org/stable/c/bdecd912e99acfd61507f1720d3f4eed1b3418d8
• https://git.kernel.org/stable/c/e65027fdebbacd40595e96ef7b5d2418f71bddf2
• https://git.kernel.org/stable/c/f44b799603a9b5d2e375b0b2d54dd0b791eddfc2

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