An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).
{
"sources": [
{
"modified": "2026-06-17T03:15:08.083Z",
"id": "CVE-2020-36221",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36221",
"database_specific": {
"status": "Modified"
},
"published": "2021-01-26T18:15:56.693Z",
"imported": "2026-07-17T21:16:24.697Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-36221"
}
],
"license": "CC-BY-4.0"
}