CVE-2026-49414

Estado: AnalizadaAlta (7.8)—

The ELF image activator cleared per-process ASLR preference flags for setuid binaries after the code that computes the PIE base address, rather than before. As a result, a user-requested ASLR disable was still in effect at the point where the base address was chosen.

An unprivileged local user can disable ASLR for a setuid PIE binary by calling procctl(2) before execve(2). This makes exploitation of any separate memory corruption vulnerability in that binary significantly easier.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
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 principalT1548.004 Elevated Execution with Promptprivilege escalation85 %
Impacto secundarioT1556 Modify Authentication Processdefense impairment · persistence · credential access60 %

Vulnerabilidad local de escalada de privilegios en binarios setuid que permite deshabilitar ASLR antes de execve(2), facilitando explotación de corrupción de memoria. AV:L, PR:L sin UI confirma T1068. El impacto es modificación de mecanismos de defensa (ASLR) que protegen a binarios privilegiados.

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

Execution Prevention User Account Management Threat Intelligence Program Restrict File and Directory Permissions Restrict Registry Permissions Privileged Process Integrity

Tecnologías afectadas (1)

Freebsd — Freebsd

CWE

CWE-179

Referencias

https://security.freebsd.org/advisories/FreeBSD-SA-26:32.elf.asc

JSON original (NVD)

Mostrar

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