{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "5.9.5.2"
              },
              {
                "fixed": "5.9.5.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "319bbd0bb36547992c0e1302fef278c6f49d0c80"
            }
          ],
          "repo": "https://github.com/net-snmp/net-snmp",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1088",
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89147.json"
  },
  "details": "Net-SNMP through 5.9.5.2 contains a denial of service vulnerability in the SMUX module where smux_accept() performs an unauthenticated blocking read without timeout on newly accepted connections. An unauthenticated remote client can connect to the SMUX listener and send no data, causing the single-threaded snmpd main loop to block indefinitely and suspend all SNMP processing.",
  "id": "CVE-2026-89147",
  "modified": "2026-09-13T03:30:15.451273938Z",
  "published": "2026-09-11T10:46:56.944Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://gist.github.com/thesmartshadow/001cea595e75fed6aaea7389666dc9eb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89147.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89147"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/net-snmp-through-5.9.5.2-denial-of-service-via-blocking-unauthenticated-smux-read"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/net-snmp/net-snmp"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/net-snmp/net-snmp/blob/v5.9.5.2/agent/mibgroup/smux/smux.c"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Net-SNMP through 5.9.5.2 Denial of Service via Blocking Unauthenticated SMUX Read"
}