CVE-2023-53138 (GCVE-0-2023-53138)
Vulnerability from cvelistv5
Published
2025-05-02 15:56
Modified
2025-05-04 07:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: caif: Fix use-after-free in cfusbl_device_notify() syzbot reported use-after-free in cfusbl_device_notify() [1]. This causes a stack trace like below: BUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 Read of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214 CPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10227 [inline] netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341 default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 </TASK> When unregistering a net device, unregister_netdevice_many_notify() sets the device's reg_state to NETREG_UNREGISTERING, calls notifiers with NETDEV_UNREGISTER, and adds the device to the todo list. Later on, devices in the todo list are processed by netdev_run_todo(). netdev_run_todo() waits devices' reference count become 1 while rebdoadcasting NETDEV_UNREGISTER notification. When cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple times, the parent device might be freed. This could cause UAF. Processing NETDEV_UNREGISTER multiple times also causes inbalance of reference count for the module. This patch fixes the issue by accepting only first NETDEV_UNREGISTER notification.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
Version: 7ad65bf68d705b445ef10b77ab50dab22be185ee
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{
  "containers": {
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: caif: Fix use-after-free in cfusbl_device_notify()\n\nsyzbot reported use-after-free in cfusbl_device_notify() [1].  This\ncauses a stack trace like below:\n\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\n\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\n print_report mm/kasan/report.c:429 [inline]\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\n cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:87\n call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\n call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\n call_netdevice_notifiers net/core/dev.c:1997 [inline]\n netdev_wait_allrefs_any net/core/dev.c:10227 [inline]\n netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\n default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\n ops_exit_list+0x125/0x170 net/core/net_namespace.c:167\n cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n \u003c/TASK\u003e\n\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device\u0027s reg_state to NETREG_UNREGISTERING, calls notifiers\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\n\nLater on, devices in the todo list are processed by netdev_run_todo().\nnetdev_run_todo() waits devices\u0027 reference count become 1 while\nrebdoadcasting NETDEV_UNREGISTER notification.\n\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\ntimes, the parent device might be freed.  This could cause UAF.\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\nreference count for the module.\n\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\nnotification."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:50:47.919Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/68a45c3cf0e2242a533657f4f535d9b6a7447a79"
        },
        {
          "url": "https://git.kernel.org/stable/c/1793da97a23e31c5bf06631f3f3e5a25f368fd64"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dc16be373b382ddd4c274052a6e870a95e76c01"
        },
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          "url": "https://git.kernel.org/stable/c/c3aaec463a632cf4187dc017e421bfa69d7834a9"
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        },
        {
          "url": "https://git.kernel.org/stable/c/9781e98a97110f5e76999058368b4be76a788484"
        }
      ],
      "title": "net: caif: Fix use-after-free in cfusbl_device_notify()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53138",
    "datePublished": "2025-05-02T15:56:10.372Z",
    "dateReserved": "2025-05-02T15:51:43.562Z",
    "dateUpdated": "2025-05-04T07:50:47.919Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53138\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-02T16:15:32.720\",\"lastModified\":\"2025-11-10T17:39:03.013\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: caif: Fix use-after-free in cfusbl_device_notify()\\n\\nsyzbot reported use-after-free in cfusbl_device_notify() [1].  This\\ncauses a stack trace like below:\\n\\nBUG: KASAN: use-after-free in cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\\nRead of size 8 at addr ffff88807ac4e6f0 by task kworker/u4:6/1214\\n\\nCPU: 0 PID: 1214 Comm: kworker/u4:6 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\nWorkqueue: netns cleanup_net\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\\n print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313\\n print_report mm/kasan/report.c:429 [inline]\\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\\n cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138\\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:87\\n call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945\\n call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]\\n call_netdevice_notifiers net/core/dev.c:1997 [inline]\\n netdev_wait_allrefs_any net/core/dev.c:10227 [inline]\\n netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341\\n default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334\\n ops_exit_list+0x125/0x170 net/core/net_namespace.c:167\\n cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594\\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\\n \u003c/TASK\u003e\\n\\nWhen unregistering a net device, unregister_netdevice_many_notify()\\nsets the device\u0027s reg_state to NETREG_UNREGISTERING, calls notifiers\\nwith NETDEV_UNREGISTER, and adds the device to the todo list.\\n\\nLater on, devices in the todo list are processed by netdev_run_todo().\\nnetdev_run_todo() waits devices\u0027 reference count become 1 while\\nrebdoadcasting NETDEV_UNREGISTER notification.\\n\\nWhen cfusbl_device_notify() is called with NETDEV_UNREGISTER multiple\\ntimes, the parent device might be freed.  This could cause UAF.\\nProcessing NETDEV_UNREGISTER multiple times also causes inbalance of\\nreference count for the module.\\n\\nThis patch fixes the issue by accepting only first NETDEV_UNREGISTER\\nnotification.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: caif: Se corrige el use-after-free en cfusbl_device_notify() syzbot inform\u00f3 el use-after-free en cfusbl_device_notify() [1]. Esto provoca un seguimiento de pila como el siguiente: ERROR: KASAN: use-after-free en cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88807ac4e6f0 por la tarea kworker/u4:6/1214 CPU: 0 PID: 1214 Comm: kworker/u4:6 No contaminado 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Cola de trabajo: netns cleanup_net Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 cfusbl_device_notify+0x7c9/0x870 net/caif/caif_usb.c:138 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] netdev_wait_allrefs_any net/core/dev.c:10227 [inline] netdev_run_todo+0xbc0/0x10f0 net/core/dev.c:10341 default_device_exit_batch+0x44e/0x590 net/core/dev.c:11334 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302  Al anular el registro de un dispositivo de red, unregister_netdevice_many_notify() establece el estado del dispositivo en NETREG_UNREGISTERING, llama a los notificadores con NETDEV_UNREGISTER y a\u00f1ade el dispositivo a la lista de tareas pendientes. Posteriormente, netdev_run_todo() procesa los dispositivos de la lista de tareas pendientes. netdev_run_todo() espera a que el recuento de referencias de los dispositivos llegue a 1 mientras retransmite la notificaci\u00f3n NETDEV_UNREGISTER. Si se llama a cfusbl_device_notify() con NETDEV_UNREGISTER varias veces, el dispositivo principal podr\u00eda liberarse. Esto podr\u00eda causar un UAF. Procesar NETDEV_UNREGISTER varias veces tambi\u00e9n provoca un desequilibrio en el recuento de referencias del m\u00f3dulo. Este parche soluciona el problema aceptando solo la primera notificaci\u00f3n NETDEV_UNREGISTER.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.3\",\"versionEndExcluding\":\"4.14.310\",\"matchCriteriaId\":\"47DECA7B-812B-4717-9679-38537FD30B5C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.278\",\"matchCriteriaId\":\"1BE5A05F-B15B-4F08-BCE4-7DF115602DC3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.237\",\"matchCriteriaId\":\"229D3E63-7A14-4507-9222-7E4821F6FF3F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.175\",\"matchCriteriaId\":\"BEA15466-227B-46FF-B5A8-1E8679056A83\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.103\",\"matchCriteriaId\":\"7A57CCEF-C453-48CE-9A6E-71A03C369F61\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.20\",\"matchCriteriaId\":\"B22D8949-72A1-4CED-8318-A040635DEEBE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.7\",\"matchCriteriaId\":\"EFEDDF17-189C-4901-BD6B-41752E80AAA4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1793da97a23e31c5bf06631f3f3e5a25f368fd64\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/287027d8a567168a5d8ce5cb0cba16a34791a48c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3f14457e1584224f4296af613bbd99deb60b5d91\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/68a45c3cf0e2242a533657f4f535d9b6a7447a79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9781e98a97110f5e76999058368b4be76a788484\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9dc16be373b382ddd4c274052a6e870a95e76c01\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c3aaec463a632cf4187dc017e421bfa69d7834a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d1a11bbdbb5ea9f172019c5a4a3e9d8eabd72179\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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