{"schemaVersion":3,"id":"CVE-2026-11884","aliases":["UBUNTU-CVE-2026-11884","DEBIAN-CVE-2026-11884"],"status":"published","duplicateOf":null,"title":null,"description":"A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the oc_superior (SUP) field length is omitted from buffer size calculations in read_schema_dse() and schema_oc_to_string(), but the field is still written via strcat(). An attacker with Directory Manager privileges, or a compromised replication supplier, can trigger a server crash by creating objectclasses with long SUP values. 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