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CVE-2022-49680: ARM: exynos: Fix refcount leak in exynos_map_pmu

• 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: exynos: Fix refcount leak in exynos_map_pmu of_find_matching_node() 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. of_node_put() checks null pointer.

Affected products

• Linux kernel: from 3.17 before 4.9.321; from 4.10 before 4.14.286; from 4.15 before 4.19.250; from 4.20 before 5.4.202; from 5.5 before 5.10.127; from 5.11 before 5.15.51 — fixed in 4.14.286, 4.19.250, 4.9.321, 5.10.127, 5.15.51, 5.18.8

How to fix

Upgrade to a fixed version: Linux kernel 4.14.286, 4.19.250, 4.9.321, 5.10.127. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/31d09571bb071c20f6bdc0bb7ac1ef8dd2987c04
• https://git.kernel.org/stable/c/545ae5cbae839ce39bfe09828e413f1c916082de
• https://git.kernel.org/stable/c/68f28d52e6cbab8dcfa249cac4356d1d0573e868
• https://git.kernel.org/stable/c/7571bcecf01b69f0d3ec60ca41ce5d4c75411a4a
• https://git.kernel.org/stable/c/c4c79525042a4a7df96b73477feaf232fe44ae81
• https://git.kernel.org/stable/c/d23f76018e17618559da9eea179d137362023f95
• https://git.kernel.org/stable/c/f9b77a52937582a5b99a5a07e4ef1e2f48f87347
• https://git.kernel.org/stable/c/fc354856e9fad9cd36e2ad28f9da70716025055a

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