Bug 2426176 (CVE-2022-50820) - CVE-2022-50820 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
Summary: CVE-2022-50820 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_p...
Keywords:
Status: NEW
Alias: CVE-2022-50820
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-30 13:14 UTC by OSIDB Bzimport
Modified: 2025-12-31 03:51 UTC (History)
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Description OSIDB Bzimport 2025-12-30 13:14:17 UTC 
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")
Comment 1 Alexander B 2025-12-31 03:47:02 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123016-CVE-2022-50820-c3d9@gregkh/T
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