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CVE-2023-1281

Estado: ModificadaAlta (7.8)—PoC
Gravedad7.8Alta · CVSS 3.1
Probabilidad de explotación0.30 %mayor que el 22 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoDisponiblePrueba de concepto en GitHub (no verificada)

Vulnerabilidad de uso tras liberación (use-after-free) en el filtro de índice de control de tráfico (tcindex) del kernel de Linux, que permite la escalada de privilegios. El área de hash imperfecta puede actualizarse mientras los paquetes están atravesándola, lo que provoca un uso tras liberación cuando se invoca 'tcf_exts_exec()' con el tcf_ext destruido. Un usuario local malintencionado puede aprovechar esta vulnerabilidad para elevar sus privilegios a root.

Este problema afecta al kernel de Linux: desde la 4.14 anterior al commit de git ee059170b1f7e94e55fa6cadee544e176a6e59c2.

Traducción automática del texto original de NVD (en inglés).

CVSS

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

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
0.30 %
Percentil entre todas las CVEs puntuadas
22
Fecha de la puntuación
20/10/2026

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).

Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

Mostrar las 12 referencias

JSON original (NVD)

Mostrar
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