FKIE_CVE-2026-41285

Vulnerability from fkie_nvd - Published: 2026-04-21 00:16 - Updated: 2026-04-24 18:59
Severity ?
4.3 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an "nd_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.
References
cve@mitre.orghttps://github.com/openbsd/src/commit/086c5738bcd3c203bcc08d024fcf983cb409115fPatch
cve@mitre.orghttps://www.openbsd.org/errata78.htmlProduct, Release Notes
cve@mitre.orghttps://www.rfc-editor.org/rfc/rfc4861#section-4.6Not Applicable
Impacted products
Vendor Product Version
openbsd openbsd *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3F720762-1801-4CB9-827D-2D7F670BFC6B",
              "versionEndIncluding": "7.8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an \"nd_opt_len * 8 - 2\" expression with no preceding check for whether nd_opt_len is zero."
    }
  ],
  "id": "CVE-2026-41285",
  "lastModified": "2026-04-24T18:59:03.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "cve@mitre.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-21T00:16:29.480",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openbsd/src/commit/086c5738bcd3c203bcc08d024fcf983cb409115f"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://www.openbsd.org/errata78.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://www.rfc-editor.org/rfc/rfc4861#section-4.6"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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