CVE-2025-71156

Estado: AnalizadaAlta (7.8)—

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

gve: defer interrupt enabling until NAPI registration

Currently, interrupts are automatically enabled immediately upon request. This allows interrupt to fire before the associated NAPI context is fully initialized and cause failures like below:

Use the `IRQF_NO_AUTOEN` flag when requesting interrupts to prevent auto enablement and explicitly enable the interrupt in NAPI initialization path (and disable it during NAPI teardown).

This ensures that interrupt lifecycle is strictly coupled with readiness of NAPI context.

Detalles técnicos trazas, registros y código del informe original

[    0.946369] Call Trace:
[    0.946369]  <IRQ>
[    0.946369]  __napi_poll+0x2a/0x1e0
[    0.946369]  net_rx_action+0x2f9/0x3f0
[    0.946369]  handle_softirqs+0xd6/0x2c0
[    0.946369]  ? handle_edge_irq+0xc1/0x1b0
[    0.946369]  __irq_exit_rcu+0xc3/0xe0
[    0.946369]  common_interrupt+0x81/0xa0
[    0.946369]  </IRQ>
[    0.946369]  <TASK>
[    0.946369]  asm_common_interrupt+0x22/0x40
[    0.946369] RIP: 0010:pv_native_safe_halt+0xb/0x10

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: 0.14%
Percentil entre todas las CVEs puntuadas: 3
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 escalation45 %
Impacto principalT1499.004 Application or System Exploitationimpact35 %

Vulnerabilidad de escalada local (AV:L, PR:L, acceso kernel) que causa DoS por race condition entre habilitación de interrupciones e inicialización NAPI.

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

Threat Intelligence Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2025-71156",
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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  "published": "2026-01-23T15:16:06.570",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngve: defer interrupt enabling until NAPI registration\n\nCurrently, interrupts are automatically enabled immediately upon\nrequest. This allows interrupt to fire before the associated NAPI\ncontext is fully initialized and cause failures like below:\n\n[    0.946369] Call Trace:\n[    0.946369]  <IRQ>\n[    0.946369]  __napi_poll+0x2a/0x1e0\n[    0.946369]  net_rx_action+0x2f9/0x3f0\n[    0.946369]  handle_softirqs+0xd6/0x2c0\n[    0.946369]  ? handle_edge_irq+0xc1/0x1b0\n[    0.946369]  __irq_exit_rcu+0xc3/0xe0\n[    0.946369]  common_interrupt+0x81/0xa0\n[    0.946369]  </IRQ>\n[    0.946369]  <TASK>\n[    0.946369]  asm_common_interrupt+0x22/0x40\n[    0.946369] RIP: 0010:pv_native_safe_halt+0xb/0x10\n\nUse the `IRQF_NO_AUTOEN` flag when requesting interrupts to prevent auto\nenablement and explicitly enable the interrupt in NAPI initialization\npath (and disable it during NAPI teardown).\n\nThis ensures that interrupt lifecycle is strictly coupled with\nreadiness of NAPI context."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ngve: aplazar la habilitación de interrupciones hasta el registro de NAPI\n\nActualmente, las interrupciones se habilitan automáticamente inmediatamente después de la solicitud. Esto permite que la interrupción se dispare antes de que el contexto NAPI asociado esté completamente inicializado y cause fallos como los siguientes:\n\n[    0.946369] Traza de Llamada:\n[    0.946369]  \n[    0.946369]  __napi_poll+0x2a/0x1e0\n[    0.946369]  net_rx_action+0x2f9/0x3f0\n[    0.946369]  handle_softirqs+0xd6/0x2c0\n[    0.946369]  ? handle_edge_irq+0xc1/0x1b0\n[    0.946369]  __irq_exit_rcu+0xc3/0xe0\n[    0.946369]  common_interrupt+0x81/0xa0\n[    0.946369]  \n[    0.946369]  \n[    0.946369]  asm_common_interrupt+0x22/0x40\n[    0.946369] RIP: 0010:pv_native_safe_halt+0xb/0x10\n\nUtilice la bandera 'IRQF_NO_AUTOEN' al solicitar interrupciones para evitar la habilitación automática y habilitar explícitamente la interrupción en la ruta de inicialización de NAPI (y deshabilitarla durante la desinstalación de NAPI).\n\nEsto asegura que el ciclo de vida de la interrupción esté estrictamente acoplado con la disponibilidad del contexto NAPI."
    }
  ],
  "lastModified": "2026-06-17T10:03:46.567",
  "configurations": [
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