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

Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-09-07 15:45
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e521d16e76cd9ea99c585e064f4e7daf657b1451 , < ce493f9261cd3f4bffe2f72481d8c3ee01c559a3 (git)
Affected: e521d16e76cd9ea99c585e064f4e7daf657b1451 , < 40a984dd0602e238ad893b167751620e751d1199 (git)
Affected: e521d16e76cd9ea99c585e064f4e7daf657b1451 , < 0c3887a134f191723b53e2a47e501b534c8723ee (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (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"
          ],
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                  "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": "2026-09-07T15:45:02.719Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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        },
        {
          "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": "2026-09-07T15:45:02.719Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-21",
      "epss": "0.00183",
      "percentile": "0.08103"
    },
    "nvd": {
      "cve": {
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          {
            "affectedData": [
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                "product": "Linux",
                "programFiles": [
                  "drivers/platform/x86/lenovo/wmi-helpers.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "git"
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            ],
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          }
        ],
        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-63839",
        "lastModified": "2026-09-07T16:17:28.937",
        "metrics": {},
        "published": "2026-07-19T15:16:50.693",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0c3887a134f191723b53e2a47e501b534c8723ee"
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          }
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        "vulnStatus": "Awaiting Analysis"
      }
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      "cve": "CVE-2026-63839",
      "id": "CVE-2026-63839",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63839.json",
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      "cve": "CVE-2026-63839",
      "id": "CVE-2026-63839",
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      "product_status:known_not_affected": "376",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63839",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63839.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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