Vulnerability-Lookup

GHSA-WW88-VGR6-GHR7

Vulnerability from github – Published: 2025-12-30 15:30 – Updated: 2025-12-30 15:30

Details

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")

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50820"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()\n\ndmc620_pmu_init() won\u0027t remove the callback added by\ncpuhp_setup_state_multi() when platform_driver_register() failed. Remove\nthe callback by cpuhp_remove_multi_state() in fail path.\n\nSimilar to the handling of arm_ccn_init() in commit 26242b330093 (\"bus:\narm-ccn: Prevent hotplug callback leak\")",
  "id": "GHSA-ww88-vgr6-ghr7",
  "modified": "2025-12-30T15:30:26Z",
  "published": "2025-12-30T15:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50820"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adf7c3bbcc819db6e95b6a61c9822230f0ef4778"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af170afa97e50d4169cfaa7ff4ec5d3841182641"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b99fbe8d949a99fe456f08c7aad421327685aa50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9f564c966e63925aac4ba273a9319d7fb6f4b4e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2022-50820 (GCVE-0-2022-50820)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:08 – Updated: 2026-05-11 19:25

Title

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

Summary

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")

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/b99fbe8d949a99fe4…
https://git.kernel.org/stable/c/af170afa97e50d416…
https://git.kernel.org/stable/c/adf7c3bbcc819db6e…
https://git.kernel.org/stable/c/d9f564c966e63925a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 53c218da220c3619b5befec4674ffa35d590092a , < b99fbe8d949a99fe456f08c7aad421327685aa50 (git) Affected: 53c218da220c3619b5befec4674ffa35d590092a , < af170afa97e50d4169cfaa7ff4ec5d3841182641 (git) Affected: 53c218da220c3619b5befec4674ffa35d590092a , < adf7c3bbcc819db6e95b6a61c9822230f0ef4778 (git) Affected: 53c218da220c3619b5befec4674ffa35d590092a , < d9f564c966e63925aac4ba273a9319d7fb6f4b4e (git)
Linux	Linux	Affected: 5.11 Unaffected: 0 , < 5.11 (semver) Unaffected: 5.15.86 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/perf/arm_dmc620_pmu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b99fbe8d949a99fe456f08c7aad421327685aa50",
              "status": "affected",
              "version": "53c218da220c3619b5befec4674ffa35d590092a",
              "versionType": "git"
            },
            {
              "lessThan": "af170afa97e50d4169cfaa7ff4ec5d3841182641",
              "status": "affected",
              "version": "53c218da220c3619b5befec4674ffa35d590092a",
              "versionType": "git"
            },
            {
              "lessThan": "adf7c3bbcc819db6e95b6a61c9822230f0ef4778",
              "status": "affected",
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            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init()\n\ndmc620_pmu_init() won\u0027t remove the callback added by\ncpuhp_setup_state_multi() when platform_driver_register() failed. Remove\nthe callback by cpuhp_remove_multi_state() in fail path.\n\nSimilar to the handling of arm_ccn_init() in commit 26242b330093 (\"bus:\narm-ccn: Prevent hotplug callback leak\")"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:25:45.031Z",
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    "cveId": "CVE-2022-50820",
    "datePublished": "2025-12-30T12:08:34.894Z",
    "dateReserved": "2025-12-30T12:06:07.131Z",
    "dateUpdated": "2026-05-11T19:25:45.031Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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