CVE-2024-56556
Estado: ModificadaAlta (7)—
In the Linux kernel, the following vulnerability has been resolved:
binder: fix node UAF in binder_add_freeze_work()
In binder_add_freeze_work() we iterate over the proc->nodes with the proc->inner_lock held. However, this lock is temporarily dropped in order to acquire the node->lock first (lock nesting order). This can race with binder_node_release() and trigger a use-after-free:
Fix the race by taking a temporary reference on the node before releasing the proc->inner lock. This ensures the node remains alive while in use.
Detalles técnicos trazas, registros y código del informe original
================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c Write of size 4 at addr ffff53c04c29dd04 by task freeze/640 CPU: 5 UID: 0 PID: 640 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #17 Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x19c binder_add_freeze_work+0x148/0x478 binder_ioctl+0x1e70/0x25ac __arm64_sys_ioctl+0x124/0x190 Allocated by task 637: __kmalloc_cache_noprof+0x12c/0x27c binder_new_node+0x50/0x700 binder_transaction+0x35ac/0x6f74 binder_thread_write+0xfb8/0x42a0 binder_ioctl+0x18f0/0x25ac __arm64_sys_ioctl+0x124/0x190 Freed by task 637: kfree+0xf0/0x330 binder_thread_read+0x1e88/0x3a68 binder_ioctl+0x16d8/0x25ac __arm64_sys_ioctl+0x124/0x190 ==================================================================
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: 0.15%
- 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.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto secundario
T1059Command and Scripting Interpreterexecution70 %
UAF en núcleo Linux con acceso local (AV:L, PR:L). Permite escalada de privilegios (C:H I:H A:H) explotando race condition en binder IPC. Ejecución código kernel con permisos elevados.
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
Tecnologías afectadas (1)
CWE
- CWE-362, CWE-416
- CWE-416
Referencias
JSON original (NVD)
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix node UAF in binder_add_freeze_work()\n\nIn binder_add_freeze_work() we iterate over the proc->nodes with the\nproc->inner_lock held. However, this lock is temporarily dropped in\norder to acquire the node->lock first (lock nesting order). This can\nrace with binder_node_release() and trigger a use-after-free:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c\n Write of size 4 at addr ffff53c04c29dd04 by task freeze/640\n\n CPU: 5 UID: 0 PID: 640 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #17\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n _raw_spin_lock+0xe4/0x19c\n binder_add_freeze_work+0x148/0x478\n binder_ioctl+0x1e70/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Allocated by task 637:\n __kmalloc_cache_noprof+0x12c/0x27c\n binder_new_node+0x50/0x700\n binder_transaction+0x35ac/0x6f74\n binder_thread_write+0xfb8/0x42a0\n binder_ioctl+0x18f0/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Freed by task 637:\n kfree+0xf0/0x330\n binder_thread_read+0x1e88/0x3a68\n binder_ioctl+0x16d8/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n ==================================================================\n\nFix the race by taking a temporary reference on the node before\nreleasing the proc->inner lock. This ensures the node remains alive\nwhile in use."
},
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: binder: reparar el UAF del nodo en binder_add_freeze_work() En binder_add_freeze_work() iteramos sobre proc->nodes con el proc->inner_lock retenido. Sin embargo, este bloqueo se elimina temporalmente para adquirir primero el node->lock (orden de anidamiento de bloqueos). Esto puede competir con binder_node_release() y activar un use-after-free: ====================================================================== ERROR: KASAN: use-after-free de losa en _raw_spin_lock+0xe4/0x19c Escritura de tamaño 4 en la dirección ffff53c04c29dd04 por la tarea freeze/640 CPU: 5 UID: 0 PID: 640 Comm: freeze No contaminado 6.11.0-07343-ga727812a8d45 #17 Nombre del hardware: linux,dummy-virt (DT) Rastreo de llamadas: _raw_spin_lock+0xe4/0x19c binder_add_freeze_work+0x148/0x478 binder_ioctl+0x1e70/0x25ac __arm64_sys_ioctl+0x124/0x190 Asignado por la tarea 637: __kmalloc_cache_noprof+0x12c/0x27c binder_new_node+0x50/0x700 binder_transaction+0x35ac/0x6f74 binder_thread_write+0xfb8/0x42a0 binder_ioctl+0x18f0/0x25ac __arm64_sys_ioctl+0x124/0x190 Liberado por la tarea 637: kfree+0xf0/0x330 binder_thread_read+0x1e88/0x3a68 binder_ioctl+0x16d8/0x25ac __arm64_sys_ioctl+0x124/0x190 == ..."
}
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"lastModified": "2026-06-17T08:12:23.020",
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