UBUNTU-CVE-2026-2340 (CVE-2026-2340)

Vulnerability from osv_ubuntu – Published: 2026-05-26 00:00 – Updated: 2026-06-09 23:25 – Source website
VLAI
Details

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.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
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      "package": {
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        "2:4.22.3+dfsg-4ubuntu1",
        "2:4.22.3+dfsg-4ubuntu2",
        "2:4.22.3+dfsg-4ubuntu2.1",
        "2:4.22.3+dfsg-4ubuntu2.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
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            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
          },
          {
            "binary_name": "samba-vfs-glusterfs",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
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          {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
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          },
          {
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            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
          }
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      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "samba",
        "purl": "pkg:deb/ubuntu/samba@2:4.23.6+dfsg-1ubuntu2.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:4.23.6+dfsg-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:4.22.3+dfsg-4ubuntu2",
        "2:4.22.3+dfsg-4ubuntu2.1",
        "2:4.22.3+dfsg-4ubuntu3",
        "2:4.22.3+dfsg-4ubuntu4",
        "2:4.23.4+dfsg-1ubuntu1",
        "2:4.23.5+dfsg-1ubuntu2",
        "2:4.23.6+dfsg-1ubuntu1",
        "2:4.23.6+dfsg-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in Samba\u2019s 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.",
  "id": "UBUNTU-CVE-2026-2340",
  "modified": "2026-06-09T23:25:45Z",
  "published": "2026-05-26T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-2340"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-2340"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8306-1"
    }
  ],
  "related": [
    "USN-8306-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-2340"
  ]
}



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