FKIE_CVE-2026-3012

Vulnerability from fkie_nvd - Published: 2026-05-27 11:16 - Updated: 2026-07-03 13:17
Summary
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22644Issue Tracking
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22963Issue Tracking
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/security/cve/CVE-2026-3012Mitigation, Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2447319Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://bugzilla.samba.org/show_bug.cgi?id=16003Issue Tracking, Mitigation, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:22644Issue Tracking
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:22963Issue Tracking
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25049
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:25979
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:28053
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:28054
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:28055
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:28056
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:28057
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:29863
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-3012Mitigation, Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2447319Issue Tracking, Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3012.json
Impacted products

{
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          ],
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          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "0:4.23.5-109.el10_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "0:4.21.3-114.el10_0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream",
            "cpe:/a:redhat:enterprise_linux:8::crb",
            "cpe:/o:redhat:enterprise_linux:8::baseos"
          ],
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          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
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              "version": "0:4.19.4-16.el8_10",
              "versionType": "rpm"
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          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
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        },
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          "defaultStatus": "affected",
          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
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          ],
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          "vendor": "Red Hat",
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          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
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        },
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          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
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              "status": "unaffected",
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              "versionType": "rpm"
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        },
        {
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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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          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
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          "cpes": [
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          "defaultStatus": "affected",
          "packageName": "rhcos",
          "product": "Red Hat OpenShift Container Platform 4.19",
          "vendor": "Red Hat",
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          "packageName": "samba",
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          "packageName": "samba4",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
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          "packageName": "samba",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
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      "source": "secalert@redhat.com"
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Container Platform 4.19",
          "vendor": "Red Hat"
        },
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
          "vendor": "Red Hat"
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AppStream (v. 10)",
          "vendor": "Red Hat"
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          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AppStream (v. 8)",
          "vendor": "Red Hat"
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)",
          "vendor": "Red Hat"
        },
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          "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)",
          "vendor": "Red Hat"
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          "vendor": "Red Hat"
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          "defaultStatus": "affected",
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          "defaultStatus": "affected",
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          "product": "Red Hat Enterprise Linux BaseOS (v. 9)",
          "vendor": "Red Hat"
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          "product": "Red Hat Enterprise Linux CRB (v. 8)",
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          "vendor": "Red Hat"
        },
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          "product": "Red Hat Enterprise Linux Resilient Storage E4S (v.9.2)",
          "vendor": "Red Hat"
        },
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux Resilient Storage E4S (v.9.4)",
          "vendor": "Red Hat"
        },
        {
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux Resilient Storage EUS (v.9.6)",
          "vendor": "Red Hat"
        },
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          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux Resilient Storage (v. 9)",
          "vendor": "Red Hat"
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          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
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          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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              "matchCriteriaId": "932D137F-528B-4526-9A89-CD59FA1AB0FE",
              "vulnerable": true
            },
            {
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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.

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Detection rules are retrieved from Rulezet.

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