CVE-2020-36221
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 (s…
Published Jan 26, 2021 · updated Oct 14, 2026 · openldap openldap
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).
Timeline
Detection, updates, and resolution for this record.
Jan 26, 2021 · NIST NVD
Detected
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).
Oct 14, 2026 · NIST NVD
Updated
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).
Affected
- cpe apple/mac os xversion unspecified
- cpe apple/mac os x10.14.6
- cpe debian/debian linux10.0
- cpe debian/debian linux9.0
- cpe openldap/openldapversion unspecified
Sources
- CVE.orgCVE-2020-36221
Official CVE identifier
cve.org - NIST NVDCVE-2020-36221
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).
nvd.nist.gov