Medium

Samba: vfs_worm does not block directory modification

Type: advisorySource: Official CVE List1 source record

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.

Announced 27 May 2026Group revision 1

Original source ↗

CVE-2026-2340

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-2340

Red Hat Enterprise Linux 10

Source reference: /containers/cna/affected/0/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 10.0 Extended Update Support

Source reference: /containers/cna/affected/1/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8

Source reference: /containers/cna/affected/2/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8

Source reference: /containers/cna/affected/3/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Source reference: /containers/cna/affected/4/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Source reference: /containers/cna/affected/5/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Source reference: /containers/cna/affected/6/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Source reference: /containers/cna/affected/7/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9

Source reference: /containers/cna/affected/8/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9

Source reference: /containers/cna/affected/9/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Source reference: /containers/cna/affected/10/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Source reference: /containers/cna/affected/11/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 9.6 Extended Update Support

Source reference: /containers/cna/affected/12/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.12

Source reference: /containers/cna/affected/13/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.12

Source reference: /containers/cna/affected/14/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.13

Source reference: /containers/cna/affected/15/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.13

Source reference: /containers/cna/affected/16/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.14

Source reference: /containers/cna/affected/17/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.14

Source reference: /containers/cna/affected/18/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.15

Source reference: /containers/cna/affected/19/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.15

Source reference: /containers/cna/affected/20/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.16

Source reference: /containers/cna/affected/21/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.16

Source reference: /containers/cna/affected/22/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.17

Source reference: /containers/cna/affected/23/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.17

Source reference: /containers/cna/affected/24/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.18

Source reference: /containers/cna/affected/25/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.18

Source reference: /containers/cna/affected/26/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat OpenShift Container Platform 4.19

Source reference: /containers/cna/affected/27/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 6

Source reference: /containers/cna/affected/28/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 6

Source reference: /containers/cna/affected/29/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Red Hat Enterprise Linux 7

Source reference: /containers/cna/affected/30/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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      "cpe:/o:redhat:enterprise_linux:10.2"
    ],
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    "product": "Red Hat Enterprise Linux 10",
    "versions": [
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        "versionType": "rpm"
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "versions": [
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        "status": "unaffected",
        "version": "0:4.21.3-114.el10_0.1",
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    "packageName": "samba",
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "versions": [
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        "version": "0:4.19.4-16.el8_10",
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "versions": [
      {
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      "cpe:/o:redhat:rhel_eus_long_life:8.6::baseos"
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "versions": [
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        "version": "0:4.15.5-16.el8_6.1",
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        "versionType": "rpm"
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    ],
    "packageName": "samba",
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    "defaultStatus": "affected"
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  {
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      "cpe:/o:redhat:rhel_eus_long_life:8.6::baseos"
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.15.5-16.el8_6.1",
        "lessThan": "*",
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    "packageName": "samba",
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    "defaultStatus": "affected"
  },
  {
    "cpes": [
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      "cpe:/a:redhat:rhel_tus:8.8::appstream",
      "cpe:/o:redhat:rhel_e4s:8.8::baseos",
      "cpe:/o:redhat:rhel_tus:8.8::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.17.5-7.el8_8.1",
        "lessThan": "*",
        "versionType": "rpm"
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    ],
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    "cpes": [
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      "cpe:/a:redhat:rhel_tus:8.8::appstream",
      "cpe:/o:redhat:rhel_e4s:8.8::baseos",
      "cpe:/o:redhat:rhel_tus:8.8::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.17.5-7.el8_8.1",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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  {
    "cpes": [
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      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::resilientstorage",
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.23.5-10.el9_8",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    "cpes": [
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      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::resilientstorage",
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.23.5-10.el9_8",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    "cpes": [
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      "cpe:/a:redhat:rhel_e4s:9.2::resilientstorage",
      "cpe:/o:redhat:rhel_e4s:9.2::baseos"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "versions": [
      {
        "status": "unaffected",
        "version": "0:4.17.5-105.el9_2.5",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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      "cpe:/a:redhat:rhel_e4s:9.4::resilientstorage",
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    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "versions": [
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        "version": "0:4.19.4-105.el9_4.4",
        "lessThan": "*",
        "versionType": "rpm"
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    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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      "cpe:/a:redhat:rhel_eus:9.6::crb",
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      "cpe:/o:redhat:rhel_eus:9.6::baseos"
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    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.12",
    "versions": [
      {
        "status": "unaffected",
        "version": "412.86.202608241157-0",
        "lessThan": "*",
        "versionType": "rpm"
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    "packageName": "openshift/ose-rhel-coreos-8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.12",
    "versions": [
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        "status": "unaffected",
        "version": "412.86.202609082051-0",
        "lessThan": "*",
        "versionType": "rpm"
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    "packageName": "openshift/ose-rhel-coreos-8",
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    "defaultStatus": "affected"
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.13",
    "versions": [
      {
        "status": "unaffected",
        "version": "413.92.202609080414-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
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      "cpe:/a:redhat:openshift:4.13::el9"
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    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.13",
    "versions": [
      {
        "status": "unaffected",
        "version": "413.92.202609302032-0",
        "lessThan": "*",
        "versionType": "rpm"
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    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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  {
    "cpes": [
      "cpe:/a:redhat:openshift:4.14::el9"
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    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.14",
    "versions": [
      {
        "status": "unaffected",
        "version": "414.92.202608172040-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
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    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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  {
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.14",
    "versions": [
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        "status": "unaffected",
        "version": "414.92.202609011250-0",
        "lessThan": "*",
        "versionType": "rpm"
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    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.15",
    "versions": [
      {
        "status": "unaffected",
        "version": "415.92.202608180329-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    "product": "Red Hat OpenShift Container Platform 4.15",
    "versions": [
      {
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        "version": "415.92.202609140326-0",
        "lessThan": "*",
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    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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        "version": "416.94.202608150307-0",
        "lessThan": "*",
        "versionType": "rpm"
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    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.16",
    "versions": [
      {
        "status": "unaffected",
        "version": "416.94.202609011112-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "417.94.202608250221-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4.17::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.17",
    "versions": [
      {
        "status": "unaffected",
        "version": "417.94.202609191027-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
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    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "418.94.202608142238-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4.18::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.18",
    "versions": [
      {
        "status": "unaffected",
        "version": "418.94.202609031320-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:openshift:4.19::el9"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat OpenShift Container Platform 4.19",
    "versions": [
      {
        "status": "unaffected",
        "version": "4.19.9.6.202606241344-0",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "openshift/ose-rhel-coreos-9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "packageName": "samba4",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "packageName": "samba",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]

Related CVEs: CVE-2026-2340
Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event: #29866 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 08:06:19 GMT
Publisher date: Wed, 27 May 2026 12:09:32 GMT

Read the original announcement

Revision history

25 Oct 2026CVE-2026-2340 · Revision 1Source updated