CVE-2025-68239 (GCVE-0-2025-68239)
Vulnerability from cvelistv5
Published
2025-12-16 14:21
Modified
2025-12-16 14:21
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
Impacted products
Vendor Product Version
Linux Linux Version: e7850f4d844e0acfac7e570af611d89deade3146
Version: e7850f4d844e0acfac7e570af611d89deade3146
Version: 467a50d5db7deaf656e18a1f633be9ecd94b393a
Version: 4a8b4124ea4156ca52918b66c750a69c6d932aa5
Version: 3fe116e33a855bbfdd32dc207e9be2a41e3ed3a6
Version: c0e0ab60d0b15469e69db93215dad009999f5a5b
Version: 5ab9464a2a3c538eedbb438f1802f2fd98d0953f
Version: d28492be82e19fc69cc69975fc2052b37ef0c821
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "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"
            }
          ]
        },
        {
          "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": "6.17.*",
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.9",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.9.262",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.14.226",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.19.181",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.106",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.11.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T14:21:16.889Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e785f552ab04dbca01d31f0334f4561240b04459"
        },
        {
          "url": "https://git.kernel.org/stable/c/90f601b497d76f40fa66795c3ecf625b6aced9fd"
        }
      ],
      "title": "binfmt_misc: restore write access before closing files opened by open_exec()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68239",
    "datePublished": "2025-12-16T14:21:16.889Z",
    "dateReserved": "2025-12-16T13:41:40.263Z",
    "dateUpdated": "2025-12-16T14:21:16.889Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68239\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T15:15:53.063\",\"lastModified\":\"2025-12-18T15:08:06.237\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.