CVE-2024-56652
Estado: ModificadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/reg_sr: Remove register pool
That pool implementation doesn't really work: if the krealloc happens to move the memory and return another address, the entries in the xarray become invalid, leading to use-after-free later:
Simplify the code to fix the bug. A better pooling strategy may be added back later if needed.
(cherry picked from commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: slab-use-after-free in xe_reg_sr_apply_mmio+0x570/0x760 [xe] Read of size 4 at addr ffff8881244b2590 by task modprobe/2753 Allocated by task 2753: kasan_save_stack+0x39/0x70 kasan_save_track+0x14/0x40 kasan_save_alloc_info+0x37/0x60 __kasan_kmalloc+0xc3/0xd0 __kmalloc_node_track_caller_noprof+0x200/0x6d0 krealloc_noprof+0x229/0x380
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.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1059Command and Scripting Interpreterexecution60 %
CVE-2024-56652: use-after-free (CWE-416) en Linux kernel con acceso local (AV:L), sin interacción (UI:N), PR:L permite escalada de privilegios (T1068). El impacto es ejecución de código (T1059) por corrupción de memoria.
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-416
- CWE-416
Referencias
JSON original (NVD)
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/reg_sr: Remove register pool\n\nThat pool implementation doesn't really work: if the krealloc happens to\nmove the memory and return another address, the entries in the xarray\nbecome invalid, leading to use-after-free later:\n\n\tBUG: KASAN: slab-use-after-free in xe_reg_sr_apply_mmio+0x570/0x760 [xe]\n\tRead of size 4 at addr ffff8881244b2590 by task modprobe/2753\n\n\tAllocated by task 2753:\n\t kasan_save_stack+0x39/0x70\n\t kasan_save_track+0x14/0x40\n\t kasan_save_alloc_info+0x37/0x60\n\t __kasan_kmalloc+0xc3/0xd0\n\t __kmalloc_node_track_caller_noprof+0x200/0x6d0\n\t krealloc_noprof+0x229/0x380\n\nSimplify the code to fix the bug. A better pooling strategy may be added\nback later if needed.\n\n(cherry picked from commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)"
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/xe/reg_sr: Eliminar el grupo de registros Esa implementación del grupo no funciona realmente: si el krealloc mueve la memoria y devuelve otra dirección, las entradas en el xarray dejan de ser válidas, lo que lleva a un use-after-free más adelante: ERROR: KASAN: slab-use-after-free en xe_reg_sr_apply_mmio+0x570/0x760 [xe] Lectura de tamaño 4 en la dirección ffff8881244b2590 por la tarea modprobe/2753 Asignado por la tarea 2753: kasan_save_stack+0x39/0x70 kasan_save_track+0x14/0x40 kasan_save_alloc_info+0x37/0x60 __kasan_kmalloc+0xc3/0xd0 __kmalloc_node_track_caller_noprof+0x200/0x6d0 krealloc_noprof+0x229/0x380 Simplifique el código para corregir el error. Es posible que se agregue una mejor estrategia de agrupamiento más adelante si es necesario. (seleccionada de el commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)"
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