CVE-2023-53659

Estado: ModificadaAlta (7.1)—

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

iavf: Fix out-of-bounds when setting channels on remove

If we set channels greater during iavf_remove(), and waiting reset done would be timeout, then returned with error but changed num_active_queues directly, that will lead to OOB like the following logs. Because the num_active_queues is greater than tx/rx_rings[] allocated actually.

Reproducer:

Result:

Detalles técnicos trazas, registros y código del informe original

  [root@host ~]# cat repro.sh
  #!/bin/bash

  pf_dbsf="0000:41:00.0"
  vf0_dbsf="0000:41:02.0"
  g_pids=()

  function do_set_numvf()
  {
      echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
      sleep $((RANDOM%3+1))
      echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs
      sleep $((RANDOM%3+1))
  }

  function do_set_channel()
  {
      local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)
      [ -z "$nic" ] && { sleep $((RANDOM%3)) ; return 1; }
      ifconfig $nic 192.168.18.5 netmask 255.255.255.0
      ifconfig $nic up
      ethtool -L $nic combined 1
      ethtool -L $nic combined 4
      sleep $((RANDOM%3))
  }

  function on_exit()
  {
      local pid
      for pid in "${g_pids[@]}"; do
          kill -0 "$pid" &>/dev/null && kill "$pid" &>/dev/null
      done
      g_pids=()
  }

  trap "on_exit; exit" EXIT

  while :; do do_set_numvf ; done &
  g_pids+=($!)
  while :; do do_set_channel ; done &
  g_pids+=($!)

  wait

[ 3506.152887] iavf 0000:41:02.0: Removing device
[ 3510.400799] ==================================================================
[ 3510.400820] BUG: KASAN: slab-out-of-bounds in iavf_free_all_tx_resources+0x156/0x160 [iavf]
[ 3510.400823] Read of size 8 at addr ffff88b6f9311008 by task repro.sh/55536
[ 3510.400823]
[ 3510.400830] CPU: 101 PID: 55536 Comm: repro.sh Kdump: loaded Tainted: G           O     --------- -t - 4.18.0 #1
[ 3510.400832] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021
[ 3510.400835] Call Trace:
[ 3510.400851]  dump_stack+0x71/0xab
[ 3510.400860]  print_address_description+0x6b/0x290
[ 3510.400865]  ? iavf_free_all_tx_resources+0x156/0x160 [iavf]
[ 3510.400868]  kasan_report+0x14a/0x2b0
[ 3510.400873]  iavf_free_all_tx_resources+0x156/0x160 [iavf]
[ 3510.400880]  iavf_remove+0x2b6/0xc70 [iavf]
[ 3510.400884]  ? iavf_free_all_rx_resources+0x160/0x160 [iavf]
[ 3510.400891]  ? wait_woken+0x1d0/0x1d0
[ 3510.400895]  ? notifier_call_chain+0xc1/0x130
[ 3510.400903]  pci_device_remove+0xa8/0x1f0
[ 3510.400910]  device_release_driver_internal+0x1c6/0x460
[ 3510.400916]  pci_stop_bus_device+0x101/0x150
[ 3510.400919]  pci_stop_and_remove_bus_device+0xe/0x20
[ 3510.400924]  pci_iov_remove_virtfn+0x187/0x420
[ 3510.400927]  ? pci_iov_add_virtfn+0xe10/0xe10
[ 3510.400929]  ? pci_get_subsys+0x90/0x90
[ 3510.400932]  sriov_disable+0xed/0x3e0
[ 3510.400936]  ? bus_find_device+0x12d/0x1a0
[ 3510.400953]  i40e_free_vfs+0x754/0x1210 [i40e]
[ 3510.400966]  ? i40e_reset_all_vfs+0x880/0x880 [i40e]
[ 3510.400968]  ? pci_get_device+0x7c/0x90
[ 3510.400970]  ? pci_get_subsys+0x90/0x90
[ 3510.400982]  ? pci_vfs_assigned.part.7+0x144/0x210
[ 3510.400987]  ? __mutex_lock_slowpath+0x10/0x10
[ 3510.400996]  i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]
[ 3510.401001]  sriov_numvfs_store+0x214/0x290
[ 3510.401005]  ? sriov_totalvfs_show+0x30/0x30
[ 3510.401007]  ? __mutex_lock_slowpath+0x10/0x10
[ 3510.401011]  ? __check_object_size+0x15a/0x350
[ 3510.401018]  kernfs_fop_write+0x280/0x3f0
[ 3510.401022]  vfs_write+0x145/0x440
[ 3510.401025]  ksys_write+0xab/0x160
[ 3510.401028]  ? __ia32_sys_read+0xb0/0xb0
[ 3510.401031]  ? fput_many+0x1a/0x120
[ 3510.401032]  ? filp_close+0xf0/0x130
[ 3510.401038]  do_syscall_64+0xa0/0x370
[ 3510.401041]  ? page_fault+0x8/0x30
[ 3510.401043]  entry_SYSCALL_64_after_hwframe+0x65/0xca
[ 3510.401073] RIP: 0033:0x7f3a9bb842c0
[ 3510.401079] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 
---truncated---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
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 principalT1499.004 Application or System Exploitationimpact80 %

Acceso local sin interacción (AV:L/PR:L/UI:N) permite escalada mediante race condition en iavf_remove(). El OOB en lectura/escritura de memoria causa DoS (crash del kernel) en el controlador de red.

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

CWE-125

Referencias

JSON original (NVD)

Mostrar

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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix out-of-bounds when setting channels on remove\n\nIf we set channels greater during iavf_remove(), and waiting reset done\nwould be timeout, then returned with error but changed num_active_queues\ndirectly, that will lead to OOB like the following logs. Because the\nnum_active_queues is greater than tx/rx_rings[] allocated actually.\n\nReproducer:\n\n  [root@host ~]# cat repro.sh\n  #!/bin/bash\n\n  pf_dbsf=\"0000:41:00.0\"\n  vf0_dbsf=\"0000:41:02.0\"\n  g_pids=()\n\n  function do_set_numvf()\n  {\n      echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n      sleep $((RANDOM%3+1))\n      echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n      sleep $((RANDOM%3+1))\n  }\n\n  function do_set_channel()\n  {\n      local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)\n      [ -z \"$nic\" ] && { sleep $((RANDOM%3)) ; return 1; }\n      ifconfig $nic 192.168.18.5 netmask 255.255.255.0\n      ifconfig $nic up\n      ethtool -L $nic combined 1\n      ethtool -L $nic combined 4\n      sleep $((RANDOM%3))\n  }\n\n  function on_exit()\n  {\n      local pid\n      for pid in \"${g_pids[@]}\"; do\n          kill -0 \"$pid\" &>/dev/null && kill \"$pid\" &>/dev/null\n      done\n      g_pids=()\n  }\n\n  trap \"on_exit; exit\" EXIT\n\n  while :; do do_set_numvf ; done &\n  g_pids+=($!)\n  while :; do do_set_channel ; done &\n  g_pids+=($!)\n\n  wait\n\nResult:\n\n[ 3506.152887] iavf 0000:41:02.0: Removing device\n[ 3510.400799] ==================================================================\n[ 3510.400820] BUG: KASAN: slab-out-of-bounds in iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400823] Read of size 8 at addr ffff88b6f9311008 by task repro.sh/55536\n[ 3510.400823]\n[ 3510.400830] CPU: 101 PID: 55536 Comm: repro.sh Kdump: loaded Tainted: G           O     --------- -t - 4.18.0 #1\n[ 3510.400832] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021\n[ 3510.400835] Call Trace:\n[ 3510.400851]  dump_stack+0x71/0xab\n[ 3510.400860]  print_address_description+0x6b/0x290\n[ 3510.400865]  ? iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400868]  kasan_report+0x14a/0x2b0\n[ 3510.400873]  iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400880]  iavf_remove+0x2b6/0xc70 [iavf]\n[ 3510.400884]  ? iavf_free_all_rx_resources+0x160/0x160 [iavf]\n[ 3510.400891]  ? wait_woken+0x1d0/0x1d0\n[ 3510.400895]  ? notifier_call_chain+0xc1/0x130\n[ 3510.400903]  pci_device_remove+0xa8/0x1f0\n[ 3510.400910]  device_release_driver_internal+0x1c6/0x460\n[ 3510.400916]  pci_stop_bus_device+0x101/0x150\n[ 3510.400919]  pci_stop_and_remove_bus_device+0xe/0x20\n[ 3510.400924]  pci_iov_remove_virtfn+0x187/0x420\n[ 3510.400927]  ? pci_iov_add_virtfn+0xe10/0xe10\n[ 3510.400929]  ? pci_get_subsys+0x90/0x90\n[ 3510.400932]  sriov_disable+0xed/0x3e0\n[ 3510.400936]  ? bus_find_device+0x12d/0x1a0\n[ 3510.400953]  i40e_free_vfs+0x754/0x1210 [i40e]\n[ 3510.400966]  ? i40e_reset_all_vfs+0x880/0x880 [i40e]\n[ 3510.400968]  ? pci_get_device+0x7c/0x90\n[ 3510.400970]  ? pci_get_subsys+0x90/0x90\n[ 3510.400982]  ? pci_vfs_assigned.part.7+0x144/0x210\n[ 3510.400987]  ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.400996]  i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]\n[ 3510.401001]  sriov_numvfs_store+0x214/0x290\n[ 3510.401005]  ? sriov_totalvfs_show+0x30/0x30\n[ 3510.401007]  ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.401011]  ? __check_object_size+0x15a/0x350\n[ 3510.401018]  kernfs_fop_write+0x280/0x3f0\n[ 3510.401022]  vfs_write+0x145/0x440\n[ 3510.401025]  ksys_write+0xab/0x160\n[ 3510.401028]  ? __ia32_sys_read+0xb0/0xb0\n[ 3510.401031]  ? fput_many+0x1a/0x120\n[ 3510.401032]  ? filp_close+0xf0/0x130\n[ 3510.401038]  do_syscall_64+0xa0/0x370\n[ 3510.401041]  ? page_fault+0x8/0x30\n[ 3510.401043]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n[ 3510.401073] RIP: 0033:0x7f3a9bb842c0\n[ 3510.401079] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d \n---truncated---"
    }
  ],
  "lastModified": "2026-08-04T10:19:16.560",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}