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CVE-2023-53213

Estado: ModificadaAlta (7.1)—

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

wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()

Fix a slab-out-of-bounds read that occurs in kmemdup() called from brcmf_get_assoc_ies(). The bug could occur when assoc_info->req_len, data from a URB provided by a USB device, is bigger than the size of buffer which is defined as WL_EXTRA_BUF_MAX.

Add the size check for req_len/resp_len of assoc_info.

Found by a modified version of syzkaller.

Detalles técnicos trazas, registros y código del informe original
[   46.592467][    T7] ==================================================================
[   46.594687][    T7] BUG: KASAN: slab-out-of-bounds in kmemdup+0x3e/0x50
[   46.596572][    T7] Read of size 3014656 at addr ffff888019442000 by task kworker/0:1/7
[   46.598575][    T7]
[   46.599157][    T7] CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G           O      5.14.0+ #145
[   46.601333][    T7] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
[   46.604360][    T7] Workqueue: events brcmf_fweh_event_worker
[   46.605943][    T7] Call Trace:
[   46.606584][    T7]  dump_stack_lvl+0x8e/0xd1
[   46.607446][    T7]  print_address_description.constprop.0.cold+0x93/0x334
[   46.608610][    T7]  ? kmemdup+0x3e/0x50
[   46.609341][    T7]  kasan_report.cold+0x79/0xd5
[   46.610151][    T7]  ? kmemdup+0x3e/0x50
[   46.610796][    T7]  kasan_check_range+0x14e/0x1b0
[   46.611691][    T7]  memcpy+0x20/0x60
[   46.612323][    T7]  kmemdup+0x3e/0x50
[   46.612987][    T7]  brcmf_get_assoc_ies+0x967/0xf60
[   46.613904][    T7]  ? brcmf_notify_vif_event+0x3d0/0x3d0
[   46.614831][    T7]  ? lock_chain_count+0x20/0x20
[   46.615683][    T7]  ? mark_lock.part.0+0xfc/0x2770
[   46.616552][    T7]  ? lock_chain_count+0x20/0x20
[   46.617409][    T7]  ? mark_lock.part.0+0xfc/0x2770
[   46.618244][    T7]  ? lock_chain_count+0x20/0x20
[   46.619024][    T7]  brcmf_bss_connect_done.constprop.0+0x241/0x2e0
[   46.620019][    T7]  ? brcmf_parse_configure_security.isra.0+0x2a0/0x2a0
[   46.620818][    T7]  ? __lock_acquire+0x181f/0x5790
[   46.621462][    T7]  brcmf_notify_connect_status+0x448/0x1950
[   46.622134][    T7]  ? rcu_read_lock_bh_held+0xb0/0xb0
[   46.622736][    T7]  ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0
[   46.623390][    T7]  ? find_held_lock+0x2d/0x110
[   46.623962][    T7]  ? brcmf_fweh_event_worker+0x19f/0xc60
[   46.624603][    T7]  ? mark_held_locks+0x9f/0xe0
[   46.625145][    T7]  ? lockdep_hardirqs_on_prepare+0x3e0/0x3e0
[   46.625871][    T7]  ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0
[   46.626545][    T7]  brcmf_fweh_call_event_handler.isra.0+0x90/0x100
[   46.627338][    T7]  brcmf_fweh_event_worker+0x557/0xc60
[   46.627962][    T7]  ? brcmf_fweh_call_event_handler.isra.0+0x100/0x100
[   46.628736][    T7]  ? rcu_read_lock_sched_held+0xa1/0xd0
[   46.629396][    T7]  ? rcu_read_lock_bh_held+0xb0/0xb0
[   46.629970][    T7]  ? lockdep_hardirqs_on_prepare+0x273/0x3e0
[   46.630649][    T7]  process_one_work+0x92b/0x1460
[   46.631205][    T7]  ? pwq_dec_nr_in_flight+0x330/0x330
[   46.631821][    T7]  ? rwlock_bug.part.0+0x90/0x90
[   46.632347][    T7]  worker_thread+0x95/0xe00
[   46.632832][    T7]  ? __kthread_parkme+0x115/0x1e0
[   46.633393][    T7]  ? process_one_work+0x1460/0x1460
[   46.633957][    T7]  kthread+0x3a1/0x480
[   46.634369][    T7]  ? set_kthread_struct+0x120/0x120
[   46.634933][    T7]  ret_from_fork+0x1f/0x30
[   46.635431][    T7]
[   46.635687][    T7] Allocated by task 7:
[   46.636151][    T7]  kasan_save_stack+0x1b/0x40
[   46.636628][    T7]  __kasan_kmalloc+0x7c/0x90
[   46.637108][    T7]  kmem_cache_alloc_trace+0x19e/0x330
[   46.637696][    T7]  brcmf_cfg80211_attach+0x4a0/0x4040
[   46.638275][    T7]  brcmf_attach+0x389/0xd40
[   46.638739][    T7]  brcmf_usb_probe+0x12de/0x1690
[   46.639279][    T7]  usb_probe_interface+0x2aa/0x760
[   46.639820][    T7]  really_probe+0x205/0xb70
[   46.640342][    T7]  __driver_probe_device+0
---truncated---

CVSS

Probabilidad de explotación (EPSS)

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.

AV:L/PR:L sin UI indica escalada local. Slab-out-of-bounds read en driver USB brcmfmac causa DoS por lectura de memoria no válida desde dispositivo USB malicioso.

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 ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2023-53213",
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          "version": "2.0.3",
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          "programFiles": [
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  "published": "2025-09-15T15:15:47.900",
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  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()\n\nFix a slab-out-of-bounds read that occurs in kmemdup() called from\nbrcmf_get_assoc_ies().\nThe bug could occur when assoc_info->req_len, data from a URB provided\nby a USB device, is bigger than the size of buffer which is defined as\nWL_EXTRA_BUF_MAX.\n\nAdd the size check for req_len/resp_len of assoc_info.\n\nFound by a modified version of syzkaller.\n\n[   46.592467][    T7] ==================================================================\n[   46.594687][    T7] BUG: KASAN: slab-out-of-bounds in kmemdup+0x3e/0x50\n[   46.596572][    T7] Read of size 3014656 at addr ffff888019442000 by task kworker/0:1/7\n[   46.598575][    T7]\n[   46.599157][    T7] CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G           O      5.14.0+ #145\n[   46.601333][    T7] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\n[   46.604360][    T7] Workqueue: events brcmf_fweh_event_worker\n[   46.605943][    T7] Call Trace:\n[   46.606584][    T7]  dump_stack_lvl+0x8e/0xd1\n[   46.607446][    T7]  print_address_description.constprop.0.cold+0x93/0x334\n[   46.608610][    T7]  ? kmemdup+0x3e/0x50\n[   46.609341][    T7]  kasan_report.cold+0x79/0xd5\n[   46.610151][    T7]  ? kmemdup+0x3e/0x50\n[   46.610796][    T7]  kasan_check_range+0x14e/0x1b0\n[   46.611691][    T7]  memcpy+0x20/0x60\n[   46.612323][    T7]  kmemdup+0x3e/0x50\n[   46.612987][    T7]  brcmf_get_assoc_ies+0x967/0xf60\n[   46.613904][    T7]  ? brcmf_notify_vif_event+0x3d0/0x3d0\n[   46.614831][    T7]  ? lock_chain_count+0x20/0x20\n[   46.615683][    T7]  ? mark_lock.part.0+0xfc/0x2770\n[   46.616552][    T7]  ? lock_chain_count+0x20/0x20\n[   46.617409][    T7]  ? mark_lock.part.0+0xfc/0x2770\n[   46.618244][    T7]  ? lock_chain_count+0x20/0x20\n[   46.619024][    T7]  brcmf_bss_connect_done.constprop.0+0x241/0x2e0\n[   46.620019][    T7]  ? brcmf_parse_configure_security.isra.0+0x2a0/0x2a0\n[   46.620818][    T7]  ? __lock_acquire+0x181f/0x5790\n[   46.621462][    T7]  brcmf_notify_connect_status+0x448/0x1950\n[   46.622134][    T7]  ? rcu_read_lock_bh_held+0xb0/0xb0\n[   46.622736][    T7]  ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0\n[   46.623390][    T7]  ? find_held_lock+0x2d/0x110\n[   46.623962][    T7]  ? brcmf_fweh_event_worker+0x19f/0xc60\n[   46.624603][    T7]  ? mark_held_locks+0x9f/0xe0\n[   46.625145][    T7]  ? lockdep_hardirqs_on_prepare+0x3e0/0x3e0\n[   46.625871][    T7]  ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0\n[   46.626545][    T7]  brcmf_fweh_call_event_handler.isra.0+0x90/0x100\n[   46.627338][    T7]  brcmf_fweh_event_worker+0x557/0xc60\n[   46.627962][    T7]  ? brcmf_fweh_call_event_handler.isra.0+0x100/0x100\n[   46.628736][    T7]  ? rcu_read_lock_sched_held+0xa1/0xd0\n[   46.629396][    T7]  ? rcu_read_lock_bh_held+0xb0/0xb0\n[   46.629970][    T7]  ? lockdep_hardirqs_on_prepare+0x273/0x3e0\n[   46.630649][    T7]  process_one_work+0x92b/0x1460\n[   46.631205][    T7]  ? pwq_dec_nr_in_flight+0x330/0x330\n[   46.631821][    T7]  ? rwlock_bug.part.0+0x90/0x90\n[   46.632347][    T7]  worker_thread+0x95/0xe00\n[   46.632832][    T7]  ? __kthread_parkme+0x115/0x1e0\n[   46.633393][    T7]  ? process_one_work+0x1460/0x1460\n[   46.633957][    T7]  kthread+0x3a1/0x480\n[   46.634369][    T7]  ? set_kthread_struct+0x120/0x120\n[   46.634933][    T7]  ret_from_fork+0x1f/0x30\n[   46.635431][    T7]\n[   46.635687][    T7] Allocated by task 7:\n[   46.636151][    T7]  kasan_save_stack+0x1b/0x40\n[   46.636628][    T7]  __kasan_kmalloc+0x7c/0x90\n[   46.637108][    T7]  kmem_cache_alloc_trace+0x19e/0x330\n[   46.637696][    T7]  brcmf_cfg80211_attach+0x4a0/0x4040\n[   46.638275][    T7]  brcmf_attach+0x389/0xd40\n[   46.638739][    T7]  brcmf_usb_probe+0x12de/0x1690\n[   46.639279][    T7]  usb_probe_interface+0x2aa/0x760\n[   46.639820][    T7]  really_probe+0x205/0xb70\n[   46.640342][    T7]  __driver_probe_device+0\n---truncated---"
    }
  ],
  "lastModified": "2026-08-04T10:18:57.867",
  "configurations": [
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