CVE-2022-50820
published 2025-12-30CVE-2022-50820: 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…
PriorityP419low3.3
EPSS
0.21%
11.1th percentile
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
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.4-1 (bookworm) | linux 6.1.4-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 53c218da220c3619b5befec4674ffa35d590092a < b99fbe8d949a99fe456f08c7aad421327685aa50 | b99fbe8d949a99fe456f08c7aad421327685aa50 |
| linux | linux | >= 53c218da220c3619b5befec4674ffa35d590092a < af170afa97e50d4169cfaa7ff4ec5d3841182641 | af170afa97e50d4169cfaa7ff4ec5d3841182641 |
| linux | linux | >= 53c218da220c3619b5befec4674ffa35d590092a < adf7c3bbcc819db6e95b6a61c9822230f0ef4778 | adf7c3bbcc819db6e95b6a61c9822230f0ef4778 |
| linux | linux | >= 53c218da220c3619b5befec4674ffa35d590092a < d9f564c966e63925aac4ba273a9319d7fb6f4b4e | d9f564c966e63925aac4ba273a9319d7fb6f4b4e |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 5.11.0 < 5.15.86 | 5.15.86 |
| linux | linux_kernel | >= 5.16.0 < 6.0.16 | 6.0.16 |
| linux | linux_kernel | >= 6.1.0 < 6.1.2 | 6.1.2 |
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GHSA
GHSA-ww88-vgr6-ghr7: In the Linux kernel, the following vulnerability has been resolved:
perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
dmc620_pmu_init(
ghsa_unreviewed·2025-12-30
CVE-2022-50820 GHSA-ww88-vgr6-ghr7: In the Linux kernel, the following vulnerability has been resolved:
perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
dmc620_pmu_init(
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")
OSV
CVE-2022-50820: In the Linux kernel, the following vulnerability has been resolved: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() dmc620_pmu_init()
osv·2025-12-30
CVE-2022-50820 CVE-2022-50820: In the Linux kernel, the following vulnerability has been resolved: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() dmc620_pmu_init()
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")
OSV
perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
osv·2025-12-30
CVE-2022-50820 perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
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")
Red Hat
kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
vendor_redhat·2025-12-30·CVSS 3.3
CVE-2022-50820 [LOW] CWE-772 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
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")
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
Debian
CVE-2022-50820: linux - In the Linux kernel, the following vulnerability has been resolved: perf/arm_dm...
vendor_debian·2022
CVE-2022-50820 CVE-2022-50820: linux - In the Linux kernel, the following vulnerability has been resolved: perf/arm_dm...
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")
Scope: local
bookworm: resolved (fixed in 6.1.4-1)
bullseye: resolved
forky: resolved (fixed in 6.1.4-1)
sid: resolved (fixed in 6.1.4-1)
trixie: resolved (fixed in 6.1.4-1)
No detection rules found.
No public exploits indexed.
Wiz
CVE-2022-50820 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2022-50820 CVE-2022-50820 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2022-50820 :
Linux Kernel vulnerability analysis and mitigation
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")
Source : NVD
Published December 30, 2025
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 7.4
Exploitation Probability (EPSS) N/A
Aff
Bugzilla
CVE-2022-50820 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
bugzilla·2025-12-30
CVE-2022-50820 [LOW] CVE-2022-50820 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
CVE-2022-50820 kernel: perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()
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")
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123016-CVE-2022-50820-c3d9@gregkh/T
2025-12-30
Published