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CVE-2022-49656: ARM: meson: Fix refcount leak in meson_smp_prepare_cpus

• 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: ARM: meson: Fix refcount leak in meson_smp_prepare_cpus of_find_compatible_node() 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 4.15 before 4.19.252; from 4.20 before 5.4.205; from 5.5 before 5.10.130; from 5.11 before 5.15.54; from 5.16 before 5.18.11; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4, 5.19-rc5 — fixed in 4.19.252, 5.10.130, 5.15.54, 5.18.11, 5.4.205

How to fix

Upgrade to a fixed version: Linux kernel 4.19.252, 5.10.130, 5.15.54, 5.18.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2e1bcd33478ef44e63a45457055060b5fe4118ad
• https://git.kernel.org/stable/c/34d2cd3fccced12b958b8848e3eff0ee4296764c
• https://git.kernel.org/stable/c/3cf8ece9113242c10f83c7675ea4f4f67959ee43
• https://git.kernel.org/stable/c/3d90607e7e6afa89768b0aaa915b58bd2b849276
• https://git.kernel.org/stable/c/7208101ded1e9dcc52c8f0f8b16474211c871c1a
• https://git.kernel.org/stable/c/c5fbf4f74c94fd60d5e9bf9f7f8268c3601562ca

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