FKIE_CVE-2026-1933

Vulnerability from fkie_nvd - Published: 2026-05-27 14:16 - Updated: 2026-06-17 13:20
Severity
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.
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/security/cve/CVE-2026-1933Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2447317Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://bugzilla.samba.org/show_bug.cgi?id=15992Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
redhat openshift_container_platform 4.0
samba samba *
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0
To clipboard 

{
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      "affectedData": [
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              "versionType": "rpm"
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          ]
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          "vendor": "Red Hat",
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              "status": "unaffected",
              "version": "0:4.19.4-16.el8_10",
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            }
          ]
        },
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        },
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          "vendor": "Red Hat",
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        },
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            "cpe:/o:redhat:rhel_eus:9.6::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "0:4.21.3-14.el9_6.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          ],
          "defaultStatus": "unknown",
          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
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          "packageName": "samba4",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
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          "vendor": "Red Hat"
        },
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "rhcos",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
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              "vulnerable": true
            },
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              "matchCriteriaId": "885550D7-888E-447A-9658-763D1C0348EA",
              "versionEndExcluding": "4.2.2",
              "versionStartIncluding": "4.1.0",
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Samba\u2019s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types."
    }
  ],
  "id": "CVE-2026-1933",
  "lastModified": "2026-06-17T13:20:04.673",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
          "version": "3.1"
        },
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        "impactScore": 4.2,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      },
      {
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
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        "impactScore": 3.6,
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          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-27T14:40:45.546157Z",
          "version": "2.0.3"
        }
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  },
  "published": "2026-05-27T14:16:44.023",
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
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}


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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.


Detection rules are retrieved from Rulezet.