CVE-2025-38258 (GCVE-0-2025-38258)

Vulnerability from cvelistv5 – Published: 2025-07-09 10:42 – Updated: 2025-07-28 04:16
VLAI?
Title
mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write memcg_path_store() assigns a newly allocated memory buffer to filter->memcg_path, without deallocating the previously allocated and assigned memory buffer. As a result, users can leak kernel memory by continuously writing a data to memcg_path DAMOS sysfs file. Fix the leak by deallocating the previously set memory buffer.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7ee161f18b5da5170b5d6a51aace49d312099128 , < 490a43d07f1663d827e802720d30cbc0494e4f81 (git)
Affected: 7ee161f18b5da5170b5d6a51aace49d312099128 , < c5d5b0047b0c0f304608f3824139f7bd34c48413 (git)
Affected: 7ee161f18b5da5170b5d6a51aace49d312099128 , < 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1 (git)
Affected: 7ee161f18b5da5170b5d6a51aace49d312099128 , < 4f489fe6afb395dbc79840efa3c05440b760d883 (git)
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    Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.96 , ≤ 6.6.* (semver)
Unaffected: 6.12.36 , ≤ 6.12.* (semver)
Unaffected: 6.15.5 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/damon/sysfs-schemes.c"
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                  "vulnerable": true
                },
                {
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter-\u003ememcg_path on write\n\nmemcg_path_store() assigns a newly allocated memory buffer to\nfilter-\u003ememcg_path, without deallocating the previously allocated and\nassigned memory buffer.  As a result, users can leak kernel memory by\ncontinuously writing a data to memcg_path DAMOS sysfs file.  Fix the leak\nby deallocating the previously set memory buffer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:16:23.939Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/490a43d07f1663d827e802720d30cbc0494e4f81"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4f489fe6afb395dbc79840efa3c05440b760d883"
        }
      ],
      "title": "mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter-\u003ememcg_path on write",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38258",
    "datePublished": "2025-07-09T10:42:35.000Z",
    "dateReserved": "2025-04-16T04:51:23.997Z",
    "dateUpdated": "2025-07-28T04:16:23.939Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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