{
	"document":{
		"aggregate_severity":{
			"namespace":"https://nvd.nist.gov/vuln-metrics/cvss",
			"text":"HIGH"
		},
		"category":"csaf_vex",
		"csaf_version":"2.0",
		"distribution":{
			"tlp":{
				"label":"WHITE",
				"url":"https:/www.first.org/tlp/"
			}
		},
		"lang":"en",
		"notes":[
			{
				"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: add flush_workqueue to prevent uaf\n\nOur detector found a concurrent use-after-free bug when detaching an\nNCI device. The main reason for this bug is the unexpected scheduling\nbetween the used delayed mechanism (timer and workqueue).\n\nThe race can be demonstrated below:\n\nThread-1                           Thread-2\n                                 | nci_dev_up()\n                                 |   nci_open_device()\n                                 |     __nci_request(nci_reset_req)\n                                 |       nci_send_cmd\n                                 |         queue_work(cmd_work)\nnci_unregister_device()          |\n  nci_close_device()             | ...\n    del_timer_sync(cmd_timer)[1] |\n...                              | Worker\nnci_free_device()                | nci_cmd_work()\n  kfree(ndev)[3]                 |   mod_timer(cmd_timer)[2]\n\nIn short, the cleanup routine thought that the cmd_timer has already\nbeen detached by [1] but the mod_timer can re-attach the timer [2], even\nit is already released [3], resulting in UAF.\n\nThis UAF is easy to trigger, crash trace by POC is like below\n\n[   66.703713] ==================================================================\n[   66.703974] BUG: KASAN: use-after-free in enqueue_timer+0x448/0x490\n[   66.703974] Write of size 8 at addr ffff888009fb7058 by task kworker/u4:1/33\n[   66.703974]\n[   66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 Not tainted 5.18.0-rc2 #5\n[   66.703974] Workqueue: nfc2_nci_cmd_wq nci_cmd_work\n[   66.703974] Call Trace:\n[   66.703974]  <TASK>\n[   66.703974]  dump_stack_lvl+0x57/0x7d\n[   66.703974]  print_report.cold+0x5e/0x5db\n[   66.703974]  ? enqueue_timer+0x448/0x490\n[   66.703974]  kasan_report+0xbe/0x1c0\n[   66.703974]  ? enqueue_timer+0x448/0x490\n[   66.703974]  enqueue_timer+0x448/0x490\n[   66.703974]  __mod_timer+0x5e6/0xb80\n[   66.703974]  ? mark_held_locks+0x9e/0xe0\n[   66.703974]  ? try_to_del_timer_sync+0xf0/0xf0\n[   66.703974]  ? lockdep_hardirqs_on_prepare+0x17b/0x410\n[   66.703974]  ? queue_work_on+0x61/0x80\n[   66.703974]  ? lockdep_hardirqs_on+0xbf/0x130\n[   66.703974]  process_one_work+0x8bb/0x1510\n[   66.703974]  ? lockdep_hardirqs_on_prepare+0x410/0x410\n[   66.703974]  ? pwq_dec_nr_in_flight+0x230/0x230\n[   66.703974]  ? rwlock_bug.part.0+0x90/0x90\n[   66.703974]  ? _raw_spin_lock_irq+0x41/0x50\n[   66.703974]  worker_thread+0x575/0x1190\n[   66.703974]  ? process_one_work+0x1510/0x1510\n[   66.703974]  kthread+0x2a0/0x340\n[   66.703974]  ? kthread_complete_and_exit+0x20/0x20\n[   66.703974]  ret_from_fork+0x22/0x30\n[   66.703974]  </TASK>\n[   66.703974]\n[   66.703974] Allocated by task 267:\n[   66.703974]  kasan_save_stack+0x1e/0x40\n[   66.703974]  __kasan_kmalloc+0x81/0xa0\n[   66.703974]  nci_allocate_device+0xd3/0x390\n[   66.703974]  nfcmrvl_nci_register_dev+0x183/0x2c0\n[   66.703974]  nfcmrvl_nci_uart_open+0xf2/0x1dd\n[   66.703974]  nci_uart_tty_ioctl+0x2c3/0x4a0\n[   66.703974]  tty_ioctl+0x764/0x1310\n[   66.703974]  __x64_sys_ioctl+0x122/0x190\n[   66.703974]  do_syscall_64+0x3b/0x90\n[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[   66.703974]\n[   66.703974] Freed by task 406:\n[   66.703974]  kasan_save_stack+0x1e/0x40\n[   66.703974]  kasan_set_track+0x21/0x30\n[   66.703974]  kasan_set_free_info+0x20/0x30\n[   66.703974]  __kasan_slab_free+0x108/0x170\n[   66.703974]  kfree+0xb0/0x330\n[   66.703974]  nfcmrvl_nci_unregister_dev+0x90/0xd0\n[   66.703974]  nci_uart_tty_close+0xdf/0x180\n[   66.703974]  tty_ldisc_kill+0x73/0x110\n[   66.703974]  tty_ldisc_hangup+0x281/0x5b0\n[   66.703974]  __tty_hangup.part.0+0x431/0x890\n[   66.703974]  tty_release+0x3a8/0xc80\n[   66.703974]  __fput+0x1f0/0x8c0\n[   66.703974]  task_work_run+0xc9/0x170\n[   66.703974]  exit_to_user_mode_prepare+0x194/0x1a0\n[   66.703974]  syscall_exit_to_user_mode+0x19/0x50\n[   66.703974]  do_syscall_64+0x48/0x90\n[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0x\n---truncated---",
				"category":"general",
				"title":"Synopsis"
			}
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		"publisher":{
			"issuing_authority":"openEuler security committee",
			"name":"openEuler",
			"namespace":"https://www.openeuler.org",
			"contact_details":"openeuler-security@openeuler.org",
			"category":"vendor"
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		"references":[
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49059"
			},
			{
				"summary":"CVE-2022-49059 vex file",
				"category":"self",
				"url":"https://repo.openeuler.org/security/data/csaf/cve/2022/csaf-openeuler-cve-2022-49059.json"
			},
			{
				"summary":"openEuler-SA-2025-1408",
				"category":"self",
				"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1408"
			},
			{
				"summary":"CVE-2022-49059",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2022-49059&packageName=kernel"
			}
		],
		"title":"openEuler cve CVE-2022-49059",
		"tracking":{
			"initial_release_date":"2025-04-11T21:49:13+08:00",
			"revision_history":[
				{
					"date":"2025-04-11T21:49:13+08:00",
					"summary":"Initial",
					"number":"1.0.0"
				}
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			"generator":{
				"date":"2025-04-11T21:49:13+08:00",
				"engine":{
					"name":"openEuler CSAF Tool V1.0"
				}
			},
			"current_release_date":"2025-04-11T21:49:13+08:00",
			"id":"CVE-2022-49059",
			"version":"1.0.0",
			"status":"interim"
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	},
	"vulnerabilities":[
		{
			"cve":"CVE-2022-49059",
			"notes":[
				{
					"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: add flush_workqueue to prevent uaf\n\nOur detector found a concurrent use-after-free bug when detaching an\nNCI device. The main reason for this bug is the unexpected scheduling\nbetween the used delayed mechanism (timer and workqueue).\n\nThe race can be demonstrated below:\n\nThread-1                           Thread-2\n                                 | nci_dev_up()\n                                 |   nci_open_device()\n                                 |     __nci_request(nci_reset_req)\n                                 |       nci_send_cmd\n                                 |         queue_work(cmd_work)\nnci_unregister_device()          |\n  nci_close_device()             | ...\n    del_timer_sync(cmd_timer)[1] |\n...                              | Worker\nnci_free_device()                | nci_cmd_work()\n  kfree(ndev)[3]                 |   mod_timer(cmd_timer)[2]\n\nIn short, the cleanup routine thought that the cmd_timer has already\nbeen detached by [1] but the mod_timer can re-attach the timer [2], even\nit is already released [3], resulting in UAF.\n\nThis UAF is easy to trigger, crash trace by POC is like below\n\n[   66.703713] ==================================================================\n[   66.703974] BUG: KASAN: use-after-free in enqueue_timer+0x448/0x490\n[   66.703974] Write of size 8 at addr ffff888009fb7058 by task kworker/u4:1/33\n[   66.703974]\n[   66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 Not tainted 5.18.0-rc2 #5\n[   66.703974] Workqueue: nfc2_nci_cmd_wq nci_cmd_work\n[   66.703974] Call Trace:\n[   66.703974]  <TASK>\n[   66.703974]  dump_stack_lvl+0x57/0x7d\n[   66.703974]  print_report.cold+0x5e/0x5db\n[   66.703974]  ? enqueue_timer+0x448/0x490\n[   66.703974]  kasan_report+0xbe/0x1c0\n[   66.703974]  ? enqueue_timer+0x448/0x490\n[   66.703974]  enqueue_timer+0x448/0x490\n[   66.703974]  __mod_timer+0x5e6/0xb80\n[   66.703974]  ? mark_held_locks+0x9e/0xe0\n[   66.703974]  ? try_to_del_timer_sync+0xf0/0xf0\n[   66.703974]  ? lockdep_hardirqs_on_prepare+0x17b/0x410\n[   66.703974]  ? queue_work_on+0x61/0x80\n[   66.703974]  ? lockdep_hardirqs_on+0xbf/0x130\n[   66.703974]  process_one_work+0x8bb/0x1510\n[   66.703974]  ? lockdep_hardirqs_on_prepare+0x410/0x410\n[   66.703974]  ? pwq_dec_nr_in_flight+0x230/0x230\n[   66.703974]  ? rwlock_bug.part.0+0x90/0x90\n[   66.703974]  ? _raw_spin_lock_irq+0x41/0x50\n[   66.703974]  worker_thread+0x575/0x1190\n[   66.703974]  ? process_one_work+0x1510/0x1510\n[   66.703974]  kthread+0x2a0/0x340\n[   66.703974]  ? kthread_complete_and_exit+0x20/0x20\n[   66.703974]  ret_from_fork+0x22/0x30\n[   66.703974]  </TASK>\n[   66.703974]\n[   66.703974] Allocated by task 267:\n[   66.703974]  kasan_save_stack+0x1e/0x40\n[   66.703974]  __kasan_kmalloc+0x81/0xa0\n[   66.703974]  nci_allocate_device+0xd3/0x390\n[   66.703974]  nfcmrvl_nci_register_dev+0x183/0x2c0\n[   66.703974]  nfcmrvl_nci_uart_open+0xf2/0x1dd\n[   66.703974]  nci_uart_tty_ioctl+0x2c3/0x4a0\n[   66.703974]  tty_ioctl+0x764/0x1310\n[   66.703974]  __x64_sys_ioctl+0x122/0x190\n[   66.703974]  do_syscall_64+0x3b/0x90\n[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[   66.703974]\n[   66.703974] Freed by task 406:\n[   66.703974]  kasan_save_stack+0x1e/0x40\n[   66.703974]  kasan_set_track+0x21/0x30\n[   66.703974]  kasan_set_free_info+0x20/0x30\n[   66.703974]  __kasan_slab_free+0x108/0x170\n[   66.703974]  kfree+0xb0/0x330\n[   66.703974]  nfcmrvl_nci_unregister_dev+0x90/0xd0\n[   66.703974]  nci_uart_tty_close+0xdf/0x180\n[   66.703974]  tty_ldisc_kill+0x73/0x110\n[   66.703974]  tty_ldisc_hangup+0x281/0x5b0\n[   66.703974]  __tty_hangup.part.0+0x431/0x890\n[   66.703974]  tty_release+0x3a8/0xc80\n[   66.703974]  __fput+0x1f0/0x8c0\n[   66.703974]  task_work_run+0xc9/0x170\n[   66.703974]  exit_to_user_mode_prepare+0x194/0x1a0\n[   66.703974]  syscall_exit_to_user_mode+0x19/0x50\n[   66.703974]  do_syscall_64+0x48/0x90\n[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0x\n---truncated---",
					"category":"description",
					"title":"Vulnerability Description"
				}
			],
			"product_status":{
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					],
					"details":"kernel security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1408"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"HIGH",
						"baseScore":7.8,
						"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
						"version":"3.1"
					},
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					]
				}
			],
			"threats":[
				{
					"details":"High",
					"category":"impact"
				}
			],
			"title":"CVE-2022-49059"
		}
	]
}