What’s Vulnerable › Vulnerabilities

CVE-2022-50820: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()

• Severity: unknown
• 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: 2025-12-30 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() dmc620_pmu_init() won't remove the callback added by cpuhp_setup_state_multi() when platform_driver_register() failed. Remove the callback by cpuhp_remove_multi_state() in fail path. Similar to the handling of arm_ccn_init() in commit 26242b330093 ("bus: arm-ccn: Prevent hotplug callback leak")

Affected products

• Linux kernel: 5.11 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux kernel 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/adf7c3bbcc819db6e95b6a61c9822230f0ef4778
• https://git.kernel.org/stable/c/af170afa97e50d4169cfaa7ff4ec5d3841182641
• https://git.kernel.org/stable/c/b99fbe8d949a99fe456f08c7aad421327685aa50
• https://git.kernel.org/stable/c/d9f564c966e63925aac4ba273a9319d7fb6f4b4e

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