CVE-2026-43377

Estado: AnalizadaAlta (8.1)—

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Don't log keys in SMB3 signing and encryption key generation

When KSMBD_DEBUG_AUTH logging is enabled, generate_smb3signingkey() and generate_smb3encryptionkey() log the session, signing, encryption, and decryption key bytes. Remove the logs to avoid exposing credentials.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 8.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.33%
Percentil entre todas las CVEs puntuadas: 25
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement85 %
Impacto principalT1552.007 Container APIcredential access75 %
Impacto secundarioT1041 Exfiltration Over C2 Channelexfiltration60 %

Vulnerabilidad en KSMBD que expone credenciales (claves de firmado y cifrado SMB3) en logs de depuración cuando KSMBD_DEBUG_AUTH está habilitado. Acceso remoto autenticado (PR:L) sin interacción. Impacto: robo de credenciales y fuga de datos.

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

Privileged Account Management Network Segmentation Vulnerability Scanning User Account Management Threat Intelligence Program Network Intrusion Prevention

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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