FKIE_CVE-2025-68239

Vulnerability from fkie_nvd - Published: 2025-12-16 15:15 - Updated: 2026-06-17 09:58
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access before closing files opened by open_exec() bm_register_write() opens an executable file using open_exec(), which internally calls do_open_execat() and denies write access on the file to avoid modification while it is being executed. However, when an error occurs, bm_register_write() closes the file using filp_close() directly. This does not restore the write permission, which may cause subsequent write operations on the same file to fail. Fix this by calling exe_file_allow_write_access() before filp_close() to restore the write permission properly.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/54274ff90488b6c0f595a6518faed3cf0bc966eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cce7bc7fac8471c832696720d9c8f2a976d9c54
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/90f601b497d76f40fa66795c3ecf625b6aced9fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e785f552ab04dbca01d31f0334f4561240b04459
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fbab8c08e1a6dbaef81e22d672a7647553101d16
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/binfmt_misc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "54274ff90488b6c0f595a6518faed3cf0bc966eb",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "lessThan": "480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "lessThan": "fbab8c08e1a6dbaef81e22d672a7647553101d16",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "lessThan": "6cce7bc7fac8471c832696720d9c8f2a976d9c54",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "lessThan": "e785f552ab04dbca01d31f0334f4561240b04459",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "lessThan": "90f601b497d76f40fa66795c3ecf625b6aced9fd",
              "status": "affected",
              "version": "e7850f4d844e0acfac7e570af611d89deade3146",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "467a50d5db7deaf656e18a1f633be9ecd94b393a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a8b4124ea4156ca52918b66c750a69c6d932aa5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3fe116e33a855bbfdd32dc207e9be2a41e3ed3a6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c0e0ab60d0b15469e69db93215dad009999f5a5b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ab9464a2a3c538eedbb438f1802f2fd98d0953f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d28492be82e19fc69cc69975fc2052b37ef0c821",
              "versionType": "git"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.262",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.226",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.181",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.106",
              "versionType": "semver"
            },
            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.24",
              "versionType": "semver"
            },
            {
              "lessThan": "5.12",
              "status": "affected",
              "version": "5.11.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/binfmt_misc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinfmt_misc: restore write access before closing files opened by open_exec()\n\nbm_register_write() opens an executable file using open_exec(), which\ninternally calls do_open_execat() and denies write access on the file to\navoid modification while it is being executed.\n\nHowever, when an error occurs, bm_register_write() closes the file using\nfilp_close() directly. This does not restore the write permission, which\nmay cause subsequent write operations on the same file to fail.\n\nFix this by calling exe_file_allow_write_access() before filp_close() to\nrestore the write permission properly."
    }
  ],
  "id": "CVE-2025-68239",
  "lastModified": "2026-06-17T09:58:47.200",
  "metrics": {},
  "published": "2025-12-16T15:15:53.063",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/54274ff90488b6c0f595a6518faed3cf0bc966eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6cce7bc7fac8471c832696720d9c8f2a976d9c54"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/90f601b497d76f40fa66795c3ecf625b6aced9fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e785f552ab04dbca01d31f0334f4561240b04459"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fbab8c08e1a6dbaef81e22d672a7647553101d16"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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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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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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