GHSA-5GG4-M865-6QWR

Vulnerability from github – Published: 2026-07-31 12:30 – Updated: 2026-08-18 15:31
VLAI
Details

A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-15722"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-31T10:16:44Z",
    "severity": "HIGH"
  },
  "details": "A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.",
  "id": "GHSA-5gg4-m865-6qwr",
  "modified": "2026-08-18T15:31:17Z",
  "published": "2026-07-31T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15722"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2499961"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-15722"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56050"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56048"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56047"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55794"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55758"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55757"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55756"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55532"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55530"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55426"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55425"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55424"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55423"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:55422"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:55421"
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  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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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

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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.
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  • 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.