fkie_cve-2023-53556
Vulnerability from fkie_nvd
Published
2025-10-04 16:15
Modified
2025-10-06 14:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iavf: Fix use-after-free in free_netdev We do netif_napi_add() for all allocated q_vectors[], but potentially do netif_napi_del() for part of them, then kfree q_vectors and leave invalid pointers at dev->napi_list. Reproducer: [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 Result: [ 4093.900222] ================================================================== [ 4093.900230] BUG: KASAN: use-after-free in free_netdev+0x308/0x390 [ 4093.900232] Read of size 8 at addr ffff88b4dc145640 by task repro.sh/6699 [ 4093.900233] [ 4093.900236] CPU: 10 PID: 6699 Comm: repro.sh Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1 [ 4093.900238] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021 [ 4093.900239] Call Trace: [ 4093.900244] dump_stack+0x71/0xab [ 4093.900249] print_address_description+0x6b/0x290 [ 4093.900251] ? free_netdev+0x308/0x390 [ 4093.900252] kasan_report+0x14a/0x2b0 [ 4093.900254] free_netdev+0x308/0x390 [ 4093.900261] iavf_remove+0x825/0xd20 [iavf] [ 4093.900265] pci_device_remove+0xa8/0x1f0 [ 4093.900268] device_release_driver_internal+0x1c6/0x460 [ 4093.900271] pci_stop_bus_device+0x101/0x150 [ 4093.900273] pci_stop_and_remove_bus_device+0xe/0x20 [ 4093.900275] pci_iov_remove_virtfn+0x187/0x420 [ 4093.900277] ? pci_iov_add_virtfn+0xe10/0xe10 [ 4093.900278] ? pci_get_subsys+0x90/0x90 [ 4093.900280] sriov_disable+0xed/0x3e0 [ 4093.900282] ? bus_find_device+0x12d/0x1a0 [ 4093.900290] i40e_free_vfs+0x754/0x1210 [i40e] [ 4093.900298] ? i40e_reset_all_vfs+0x880/0x880 [i40e] [ 4093.900299] ? pci_get_device+0x7c/0x90 [ 4093.900300] ? pci_get_subsys+0x90/0x90 [ 4093.900306] ? pci_vfs_assigned.part.7+0x144/0x210 [ 4093.900309] ? __mutex_lock_slowpath+0x10/0x10 [ 4093.900315] i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e] [ 4093.900318] sriov_numvfs_store+0x214/0x290 [ 4093.900320] ? sriov_totalvfs_show+0x30/0x30 [ 4093.900321] ? __mutex_lock_slowpath+0x10/0x10 [ 4093.900323] ? __check_object_size+0x15a/0x350 [ 4093.900326] kernfs_fop_write+0x280/0x3f0 [ 4093.900329] vfs_write+0x145/0x440 [ 4093.900330] ksys_write+0xab/0x160 [ 4093.900332] ? __ia32_sys_read+0xb0/0xb0 [ 4093.900334] ? fput_many+0x1a/0x120 [ 4093.900335] ? filp_close+0xf0/0x130 [ 4093.900338] do_syscall_64+0xa0/0x370 [ 4093.900339] ? page_fault+0x8/0x30 [ 4093.900341] entry_SYSCALL_64_after_hwframe+0x65/0xca [ 4093.900357] RIP: 0033:0x7f16ad4d22c0 [ 4093.900359] 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 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe dd 01 00 48 89 04 24 [ 4093.900360] RSP: 002b:00007ffd6491b7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 4093.900362] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f16ad4d22c0 [ 4093.900363] RDX: 0000000000000002 RSI: 0000000001a41408 RDI: 0000000000000001 [ 4093.900364] RBP: 0000000001a41408 R08: 00007f16ad7a1780 R09: 00007f16ae1f2700 [ 4093.9003 ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17046107ca15d7571551539d94e76aba2bf71fd3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/345c44e18cc10cded85cb9134830e1684495c866
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f4fa1672d98fe99d2297b03add35346f1685d6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8d781a9c53034813c3194b7d94409c7d24ac73eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4635f190f332304db4a49e827ece790b804b5db
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ca12b98e04b5d1902ac08fe826d3500cb4b6e891
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix use-after-free in free_netdev\n\nWe do netif_napi_add() for all allocated q_vectors[], but potentially\ndo netif_napi_del() for part of them, then kfree q_vectors and leave\ninvalid pointers at dev-\u003enapi_list.\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 \u003e/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n      sleep $((RANDOM%3+1))\n      echo 0 \u003e/sys/bus/pci/devices/${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\" ] \u0026\u0026 { 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 \"$pid\" \u0026\u003e/dev/null \u0026\u0026 kill \"$pid\" \u0026\u003e/dev/null\n      done\n      g_pids=()\n  }\n\n  trap \"on_exit; exit\" EXIT\n\n  while :; do do_set_numvf ; done \u0026\n  g_pids+=($!)\n  while :; do do_set_channel ; done \u0026\n  g_pids+=($!)\n\n  wait\n\nResult:\n\n[ 4093.900222] ==================================================================\n[ 4093.900230] BUG: KASAN: use-after-free in free_netdev+0x308/0x390\n[ 4093.900232] Read of size 8 at addr ffff88b4dc145640 by task repro.sh/6699\n[ 4093.900233]\n[ 4093.900236] CPU: 10 PID: 6699 Comm: repro.sh Kdump: loaded Tainted: G           O     --------- -t - 4.18.0 #1\n[ 4093.900238] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021\n[ 4093.900239] Call Trace:\n[ 4093.900244]  dump_stack+0x71/0xab\n[ 4093.900249]  print_address_description+0x6b/0x290\n[ 4093.900251]  ? free_netdev+0x308/0x390\n[ 4093.900252]  kasan_report+0x14a/0x2b0\n[ 4093.900254]  free_netdev+0x308/0x390\n[ 4093.900261]  iavf_remove+0x825/0xd20 [iavf]\n[ 4093.900265]  pci_device_remove+0xa8/0x1f0\n[ 4093.900268]  device_release_driver_internal+0x1c6/0x460\n[ 4093.900271]  pci_stop_bus_device+0x101/0x150\n[ 4093.900273]  pci_stop_and_remove_bus_device+0xe/0x20\n[ 4093.900275]  pci_iov_remove_virtfn+0x187/0x420\n[ 4093.900277]  ? pci_iov_add_virtfn+0xe10/0xe10\n[ 4093.900278]  ? pci_get_subsys+0x90/0x90\n[ 4093.900280]  sriov_disable+0xed/0x3e0\n[ 4093.900282]  ? bus_find_device+0x12d/0x1a0\n[ 4093.900290]  i40e_free_vfs+0x754/0x1210 [i40e]\n[ 4093.900298]  ? i40e_reset_all_vfs+0x880/0x880 [i40e]\n[ 4093.900299]  ? pci_get_device+0x7c/0x90\n[ 4093.900300]  ? pci_get_subsys+0x90/0x90\n[ 4093.900306]  ? pci_vfs_assigned.part.7+0x144/0x210\n[ 4093.900309]  ? __mutex_lock_slowpath+0x10/0x10\n[ 4093.900315]  i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]\n[ 4093.900318]  sriov_numvfs_store+0x214/0x290\n[ 4093.900320]  ? sriov_totalvfs_show+0x30/0x30\n[ 4093.900321]  ? __mutex_lock_slowpath+0x10/0x10\n[ 4093.900323]  ? __check_object_size+0x15a/0x350\n[ 4093.900326]  kernfs_fop_write+0x280/0x3f0\n[ 4093.900329]  vfs_write+0x145/0x440\n[ 4093.900330]  ksys_write+0xab/0x160\n[ 4093.900332]  ? __ia32_sys_read+0xb0/0xb0\n[ 4093.900334]  ? fput_many+0x1a/0x120\n[ 4093.900335]  ? filp_close+0xf0/0x130\n[ 4093.900338]  do_syscall_64+0xa0/0x370\n[ 4093.900339]  ? page_fault+0x8/0x30\n[ 4093.900341]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n[ 4093.900357] RIP: 0033:0x7f16ad4d22c0\n[ 4093.900359] 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 \u003c48\u003e 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe dd 01 00 48 89 04 24\n[ 4093.900360] RSP: 002b:00007ffd6491b7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ 4093.900362] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f16ad4d22c0\n[ 4093.900363] RDX: 0000000000000002 RSI: 0000000001a41408 RDI: 0000000000000001\n[ 4093.900364] RBP: 0000000001a41408 R08: 00007f16ad7a1780 R09: 00007f16ae1f2700\n[ 4093.9003\n---truncated---"
    }
  ],
  "id": "CVE-2023-53556",
  "lastModified": "2025-10-06T14:56:21.733",
  "metrics": {},
  "published": "2025-10-04T16:15:50.927",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17046107ca15d7571551539d94e76aba2bf71fd3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/345c44e18cc10cded85cb9134830e1684495c866"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5f4fa1672d98fe99d2297b03add35346f1685d6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d781a9c53034813c3194b7d94409c7d24ac73eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4635f190f332304db4a49e827ece790b804b5db"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ca12b98e04b5d1902ac08fe826d3500cb4b6e891"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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