CVE-2026-9064
Full vulnerability record from the local CVENow database.
Description
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-05-20 10:16:28.940000
Last modified
2026-11-05 01:17:25.933000
View original CVE JSON
{
"id": "CVE-2026-9064",
"sourceIdentifier": "[email protected]",
"published": "2026-05-20T10:16:28.940",
"lastModified": "2026-11-05T01:17:25.933",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad en 389-ds-base. La función get_ldapmessage_controls_ext() en el servidor LDAP no impone un límite superior en el número de controles por mensaje LDAP. Un atacante remoto no autenticado puede enviar una solicitud LDAP especialmente diseñada que contiene cientos de miles de controles mínimos dentro del tamaño máximo predeterminado del mensaje BER (2 MB), causando un consumo excesivo de CPU y asignación de memoria heap en el servidor. Bajo explotación concurrente, esto lleva a una degradación significativa de la latencia, agotamiento de los hilos de trabajo o terminación por falta de memoria, lo que resulta en una denegación de servicio."
}
],
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