CVE-2025-68239 (GCVE-0-2025-68239)

Vulnerability from cvelistv5 – Published: 2025-12-16 14:21 – Updated: 2026-10-15 01:09
VLAI
Title
binfmt_misc: restore write access before closing files opened by open_exec()
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < 54274ff90488b6c0f595a6518faed3cf0bc966eb (git)
Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < 480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f (git)
Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < fbab8c08e1a6dbaef81e22d672a7647553101d16 (git)
Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < 6cce7bc7fac8471c832696720d9c8f2a976d9c54 (git)
Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < e785f552ab04dbca01d31f0334f4561240b04459 (git)
Affected: e7850f4d844e0acfac7e570af611d89deade3146 , < 90f601b497d76f40fa66795c3ecf625b6aced9fd (git)
Affected: 467a50d5db7deaf656e18a1f633be9ecd94b393a (git)
Affected: 4a8b4124ea4156ca52918b66c750a69c6d932aa5 (git)
Affected: 3fe116e33a855bbfdd32dc207e9be2a41e3ed3a6 (git)
Affected: c0e0ab60d0b15469e69db93215dad009999f5a5b (git)
Affected: 5ab9464a2a3c538eedbb438f1802f2fd98d0953f (git)
Affected: d28492be82e19fc69cc69975fc2052b37ef0c821 (git)
Affected: 4.9.262 , < 4.10 (semver)
Affected: 4.14.226 , < 4.15 (semver)
Affected: 4.19.181 , < 4.20 (semver)
Affected: 5.4.106 , < 5.5 (semver)
Affected: 5.10.24 , < 5.11 (semver)
Affected: 5.11.7 , < 5.12 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.17.9 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website
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            "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."
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            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbinfmt_misc: restaurar el acceso de escritura antes de cerrar archivos abiertos por open_exec()\n\nbm_register_write() abre un archivo ejecutable usando open_exec(), que internamente llama a do_open_execat() y deniega el acceso de escritura en el archivo para evitar modificaciones mientras se est\u00e1 ejecutando.\n\nSin embargo, cuando ocurre un error, bm_register_write() cierra el archivo usando filp_close() directamente. Esto no restaura el permiso de escritura, lo que puede causar que operaciones de escritura posteriores en el mismo archivo fallen.\n\nSolucione esto llamando a exe_file_allow_write_access() antes de filp_close() para restaurar el permiso de escritura correctamente."
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        "id": "CVE-2025-68239",
        "lastModified": "2026-10-15T02:18:10.687",
        "metrics": {},
        "published": "2025-12-16T15:15:53.063",
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          {
            "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"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-07T04:41:17+00:00",
      "cve": "CVE-2025-68239",
      "id": "CVE-2025-68239",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_affected": "124",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: binfmt_misc: restore write access before closing files opened by open_exec()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68239.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-30T01:08:12Z",
      "cve": "CVE-2025-68239",
      "id": "CVE-2025-68239",
      "initial_release_date": "2025-12-17T00:24:41Z",
      "product_status:known_affected": "682",
      "product_status:known_not_affected": "187",
      "product_status:recommended": "320",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68239",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2025-68239.json",
      "version": "43"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.