CVE-2024-56554

Estado: ModificadaAlta (7.8)—

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

binder: fix freeze UAF in binder_release_work()

When a binder reference is cleaned up, any freeze work queued in the associated process should also be removed. Otherwise, the reference is freed while its ref->freeze.work is still queued in proc->work leading to a use-after-free issue as shown by the following KASAN report:

This commit fixes the issue by ensuring any queued freeze work is removed when cleaning up a binder reference.

Detalles técnicos trazas, registros y código del informe original

  ==================================================================
  BUG: KASAN: slab-use-after-free in binder_release_work+0x398/0x3d0
  Read of size 8 at addr ffff31600ee91488 by task kworker/5:1/211

  CPU: 5 UID: 0 PID: 211 Comm: kworker/5:1 Not tainted 6.11.0-rc7-00382-gfc6c92196396 #22
  Hardware name: linux,dummy-virt (DT)
  Workqueue: events binder_deferred_func
  Call trace:
   binder_release_work+0x398/0x3d0
   binder_deferred_func+0xb60/0x109c
   process_one_work+0x51c/0xbd4
   worker_thread+0x608/0xee8

  Allocated by task 703:
   __kmalloc_cache_noprof+0x130/0x280
   binder_thread_write+0xdb4/0x42a0
   binder_ioctl+0x18f0/0x25ac
   __arm64_sys_ioctl+0x124/0x190
   invoke_syscall+0x6c/0x254

  Freed by task 211:
   kfree+0xc4/0x230
   binder_deferred_func+0xae8/0x109c
   process_one_work+0x51c/0xbd4
   worker_thread+0x608/0xee8
  ==================================================================

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: 0.21%
Percentil entre todas las CVEs puntuadas: 11
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 escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution60 %

CWE-416 (use-after-free) con AV:L/PR:L/UI:N permite escalada local en kernel Linux; la pista sugiere ejecución de código como impacto, aunque el UAF en binder podría también causar DoS (T1499.004).

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 Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416
CWE-416

Referencias

JSON original (NVD)

Mostrar

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix freeze UAF in binder_release_work()\n\nWhen a binder reference is cleaned up, any freeze work queued in the\nassociated process should also be removed. Otherwise, the reference is\nfreed while its ref->freeze.work is still queued in proc->work leading\nto a use-after-free issue as shown by the following KASAN report:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in binder_release_work+0x398/0x3d0\n  Read of size 8 at addr ffff31600ee91488 by task kworker/5:1/211\n\n  CPU: 5 UID: 0 PID: 211 Comm: kworker/5:1 Not tainted 6.11.0-rc7-00382-gfc6c92196396 #22\n  Hardware name: linux,dummy-virt (DT)\n  Workqueue: events binder_deferred_func\n  Call trace:\n   binder_release_work+0x398/0x3d0\n   binder_deferred_func+0xb60/0x109c\n   process_one_work+0x51c/0xbd4\n   worker_thread+0x608/0xee8\n\n  Allocated by task 703:\n   __kmalloc_cache_noprof+0x130/0x280\n   binder_thread_write+0xdb4/0x42a0\n   binder_ioctl+0x18f0/0x25ac\n   __arm64_sys_ioctl+0x124/0x190\n   invoke_syscall+0x6c/0x254\n\n  Freed by task 211:\n   kfree+0xc4/0x230\n   binder_deferred_func+0xae8/0x109c\n   process_one_work+0x51c/0xbd4\n   worker_thread+0x608/0xee8\n  ==================================================================\n\nThis commit fixes the issue by ensuring any queued freeze work is removed\nwhen cleaning up a binder reference."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: binder: corrección del UAF congelado en binder_release_work() Cuando se limpia una referencia de binder, cualquier trabajo congelado en cola en el proceso asociado también debe eliminarse. De lo contrario, la referencia se libera mientras su ref-&gt;freeze.work todavía está en cola en proc-&gt;work, lo que genera un problema de use-after-free, como lo muestra el siguiente informe de KASAN: ====================================================================== ERROR: KASAN: slab-use-after-free en binder_release_work+0x398/0x3d0 Lectura de tamaño 8 en la dirección ffff31600ee91488 por la tarea kworker/5:1/211 CPU: 5 UID: 0 PID: 211 Comm: kworker/5:1 No contaminado 6.11.0-rc7-00382-gfc6c92196396 #22 Hardware nombre: linux,dummy-virt (DT) Cola de trabajo: eventos binder_deferred_func Rastreo de llamadas: binder_release_work+0x398/0x3d0 binder_deferred_func+0xb60/0x109c process_one_work+0x51c/0xbd4 worker_thread+0x608/0xee8 Asignado por la tarea 703: __kmalloc_cache_noprof+0x130/0x280 binder_thread_write+0xdb4/0x42a0 binder_ioctl+0x18f0/0x25ac __arm64_sys_ioctl+0x124/0x190 activate_syscall+0x6c/0x254 Liberado por la tarea 211: kfree+0xc4/0x230 binder_deferred_func+0xae8/0x109c process_one_work+0x51c/0xbd4 worker_thread+0x608/0xee8 ======================================================================= Este commit corrige el problema al garantizar que cualquier trabajo de congelamiento en cola se elimine al limpiar una referencia de binder."
    }
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  "lastModified": "2026-06-17T08:12:22.707",
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