Vulnerability-Lookup

GHSA-84PW-G3HF-X32J

Vulnerability from github – Published: 2026-07-19 15:30 – Updated: 2026-07-19 15:30

Details

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()

lwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found by sashiko.dev [1]).

Fix it by moving ret_obj = output.pointer' outside of theif (retval)' block so that it is always freed by the __free cleanup callback.

No functional change intended.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63839"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T15:16:50Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()\n\nlwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found\nby sashiko.dev [1]).\n\nFix it by moving `ret_obj = output.pointer\u0027 outside of the `if (retval)\u0027\nblock so that it is always freed by the __free cleanup callback.\n\nNo functional change intended.",
  "id": "GHSA-84pw-g3hf-x32j",
  "modified": "2026-07-19T15:30:26Z",
  "published": "2026-07-19T15:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63839"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c3887a134f191723b53e2a47e501b534c8723ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40a984dd0602e238ad893b167751620e751d1199"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-63839 (GCVE-0-2026-63839)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-07-19 14:04

Title

platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()

Summary

In the Linux kernel, the following vulnerability has been resolved: platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int() lwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found by sashiko.dev [1]). Fix it by moving `ret_obj = output.pointer' outside of the `if (retval)' block so that it is always freed by the __free cleanup callback. No functional change intended.

Severity

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/40a984dd0602e238a…
https://git.kernel.org/stable/c/0c3887a134f191723…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e521d16e76cd9ea99c585e064f4e7daf657b1451 , < 40a984dd0602e238ad893b167751620e751d1199 (git) Affected: e521d16e76cd9ea99c585e064f4e7daf657b1451 , < 0c3887a134f191723b53e2a47e501b534c8723ee (git)
Linux	Linux	Affected: 6.17 Unaffected: 0 , < 6.17 (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/lenovo/wmi-helpers.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "40a984dd0602e238ad893b167751620e751d1199",
              "status": "affected",
              "version": "e521d16e76cd9ea99c585e064f4e7daf657b1451",
              "versionType": "git"
            },
            {
              "lessThan": "0c3887a134f191723b53e2a47e501b534c8723ee",
              "status": "affected",
              "version": "e521d16e76cd9ea99c585e064f4e7daf657b1451",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/lenovo/wmi-helpers.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()\n\nlwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found\nby sashiko.dev [1]).\n\nFix it by moving `ret_obj = output.pointer\u0027 outside of the `if (retval)\u0027\nblock so that it is always freed by the __free cleanup callback.\n\nNo functional change intended."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:04:35.146Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/40a984dd0602e238ad893b167751620e751d1199"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c3887a134f191723b53e2a47e501b534c8723ee"
        }
      ],
      "title": "platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63839",
    "datePublished": "2026-07-19T14:04:35.146Z",
    "dateReserved": "2026-07-19T07:54:57.015Z",
    "dateUpdated": "2026-07-19T14:04:35.146Z",
    "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.

Action not permitted

GHSA-84PW-G3HF-X32J

CVE-2026-63839 (GCVE-0-2026-63839)

Tags

Sightings

Nomenclature