FKIE_CVE-2026-2340

Vulnerability from fkie_nvd - Published: 2026-05-27 14:16 - Updated: 2026-10-01 18:17
Summary
A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22644
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22963
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25049
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25979
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:28053
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:28054
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:28055
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:28056
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:28057
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:29863
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:56786
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:56853
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:56911
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:57483
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:59831
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:60019
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:62409
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:62549
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:65839
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:65851
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:65907
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:67857
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:70586
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-2340Mitigation, Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2447318Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://bugzilla.samba.org/show_bug.cgi?id=15997Issue Tracking, Vendor Advisory

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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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            {
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            {
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          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-29T15:35:51.156381Z",
          "version": "2.0.3"
        }
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  "published": "2026-05-27T14:16:44.387",
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    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:22644"
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      "url": "https://access.redhat.com/errata/RHSA-2026:62409"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:62549"
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    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:65839"
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      "url": "https://access.redhat.com/errata/RHSA-2026:65851"
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      "url": "https://access.redhat.com/errata/RHSA-2026:65907"
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      "url": "https://access.redhat.com/errata/RHSA-2026:70586"
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    },
    {
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      "tags": [
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      "url": "https://bugzilla.samba.org/show_bug.cgi?id=15997"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-280"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}



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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.

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.

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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.


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