CVE-2026-117548 (GCVE-0-2026-117548)
Vulnerability from cvelistv5
Published
2026-10-29 06:22
Modified
2026-10-29 06:22
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
A NULL pointer dereference flaw was found in 389-ds-base. This flaw occurs when a ModifyDN (rename) operation uses an attribute's schema alias name (such as "commonName") instead of its canonical name (such as "cn") as the new relative distinguished name. An authenticated attacker with the ModifyDN (rename) permission on the affected entry can use this flaw to crash the directory server, causing a denial of service.
References
Impacted products
Vendor Product Version
Red Hat Red Hat Directory Server 11     cpe:/a:redhat:directory_server:11
Create a notification for this product.
Show details on NVD website


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          "cpes": [
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          "packageName": "redhat-ds:11/389-ds-base",
          "product": "Red Hat Directory Server 11",
          "vendor": "Red Hat"
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          "cpes": [
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          "cpes": [
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          "cpes": [
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          "packageName": "389-ds-base",
          "product": "Red Hat Enterprise Linux 10",
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          "cpes": [
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          "cpes": [
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          "cpes": [
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          "product": "Red Hat Enterprise Linux 9",
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      "credits": [
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          "value": "Red Hat would like to thank Chad Sikorra for reporting this issue."
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      "descriptions": [
        {
          "lang": "en",
          "value": "A NULL pointer dereference flaw was found in 389-ds-base. This flaw occurs when a ModifyDN (rename) operation uses an attribute\u0027s schema alias name (such as \"commonName\") instead of its canonical name (such as \"cn\") as the new relative distinguished name. An authenticated attacker with the ModifyDN (rename) permission on the affected entry can use this flaw to crash the directory server, causing a denial of service."
        }
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      "metrics": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
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          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-117548"
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      "timeline": [
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          "lang": "en",
          "time": "2026-10-25T00:00:00.000Z",
          "value": "Reported to Red Hat."
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          "lang": "en",
          "time": "2026-10-27T11:08:00.000Z",
          "value": "Made public."
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      ],
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      "workarounds": [
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          "lang": "en",
          "value": "Administrators should review custom access control instructions (ACIs) and avoid granting the ModifyDN (rename) right to non-administrative principals unless specifically required. Restricting this right reduces exposure to this issue until a fixed package is available. Neither 389-ds-base\u0027s own default ACI templates nor Red Hat Identity Management (IdM/FreeIPA)\u0027s default ACIs grant this right to non-administrative users, so deployments that have not customized their ACIs are not exposed."
        }
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    "datePublished": "2026-10-29T06:22:06.328Z",
    "dateReserved": "2026-10-27T11:07:52.303Z",
    "dateUpdated": "2026-10-29T06:22:06.328Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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