CVE-2022-50820

kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()

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Severity

Low

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · July 22, 2026

Description

A resource leak flaw was found in the ARM DMC-620 PMU driver. If platform_driver_register() fails during module initialization, the CPU hotplug callback registered earlier is not removed, leaving a dangling callback.

Statement

This affects ARM64 systems with DMC-620 memory controllers only. The leak occurs exclusively when driver registration fails during module load — an uncommon scenario that does not impact running systems.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-772 · Missing Release of Resource after Effective Lifetime