CVE-2026-49417

Estado: AnalizadaAlta (7)—

Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid. The freed memory could then be reused elsewhere while still accessible through the stale mapping.

The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.13%
Percentil entre todas las CVEs puntuadas: 2
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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Impacto principalT1059 Command and Scripting Interpreterexecution85 %
Impacto secundarioT1499.004 Application or System Exploitationimpact80 %
Impacto secundarioT1552.007 Container APIcredential access90 %

CVE-2026-49417 en FreeBSD: acceso local (AV:L) sin interacción de usuario (UI:N) permite a usuario sin privilegios (PR:L) explotar uso-después-liberación (CWE-416) en /dev/dsp para leer/escribir memoria del kernel, escalando privilegios (T1068) o ejecutando código (T1059), lectura de memoria sensibl

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 Execution Prevention User Account Management Threat Intelligence Program Restrict Web-Based Content Network Segmentation

Tecnologías afectadas (1)

Freebsd — Freebsd

CWE

CWE-416

Referencias

https://security.freebsd.org/advisories/FreeBSD-SA-26:27.sound.asc

JSON original (NVD)

Mostrar

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