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cvelist/2023/53xxx/CVE-2023-53138.json
CVE Team 82eae9fe6f
"-Synchronized-Data."
2025-05-02 16:03:34 +00:00

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{
"data_version": "4.0",
"data_type": "CVE",
"data_format": "MITRE",
"CVE_data_meta": {
"ID": "CVE-2023-53138",
"ASSIGNER": "cve@kernel.org",
"STATE": "PUBLIC"
},
"description": {
"description_data": [
{
"lang": "eng",
"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 <TASK>\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 </TASK>\n\nWhen unregistering a net device, unregister_netdevice_many_notify()\nsets the device's 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' 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."
}
]
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"description": [
{
"lang": "eng",
"value": "n/a"
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]
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"affects": {
"vendor": {
"vendor_data": [
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"vendor_name": "Linux",
"product": {
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"product_name": "Linux",
"version": {
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},
{
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"version": "4.19.278",
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