CVE-2026-15722
Estado: ModificadaAlta (7.5)—
A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.83%
- Percentil entre todas las CVEs puntuadas: 56
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access90 % - Impacto principal
T1499.004Application or System Exploitationimpact85 %
Buffer overflow en aplicación LDAP expuesta en red (AV:N, PR:N, UI:N) que causa DoS por crash del servidor (CWE-121, stack protectors limitan a DoS). Clásica explotación remota sin autenticación.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (3)
CWE
- CWE-121
Referencias
- https://access.redhat.com/errata/RHSA-2026:55421
- https://access.redhat.com/errata/RHSA-2026:55422
- https://access.redhat.com/errata/RHSA-2026:55423
- https://access.redhat.com/errata/RHSA-2026:55424
- https://access.redhat.com/errata/RHSA-2026:55425
- https://access.redhat.com/errata/RHSA-2026:55426
- https://access.redhat.com/errata/RHSA-2026:55530
- https://access.redhat.com/errata/RHSA-2026:55532
- https://access.redhat.com/errata/RHSA-2026:55756
- https://access.redhat.com/errata/RHSA-2026:55757
- https://access.redhat.com/errata/RHSA-2026:55758
- https://access.redhat.com/errata/RHSA-2026:55794
- https://access.redhat.com/errata/RHSA-2026:56047
- https://access.redhat.com/errata/RHSA-2026:56048
- https://access.redhat.com/errata/RHSA-2026:56050
- https://access.redhat.com/security/cve/CVE-2026-15722
- https://bugzilla.redhat.com/show_bug.cgi?id=2499961
JSON original (NVD)
Mostrar
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