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EUVD-2026-310315
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 07:12
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T07:12:03.921484+00:00",
"id": "EUVD-2026-310315"
}
CVE-2022-49059 (GCVE-0-2022-49059)
Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-05-11 18:52
VLAI
EPSS
VEX
Title
nfc: nci: add flush_workqueue to prevent uaf
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfc: nci: add flush_workqueue to prevent uaf
Our detector found a concurrent use-after-free bug when detaching an
NCI device. The main reason for this bug is the unexpected scheduling
between the used delayed mechanism (timer and workqueue).
The race can be demonstrated below:
Thread-1 Thread-2
| nci_dev_up()
| nci_open_device()
| __nci_request(nci_reset_req)
| nci_send_cmd
| queue_work(cmd_work)
nci_unregister_device() |
nci_close_device() | ...
del_timer_sync(cmd_timer)[1] |
... | Worker
nci_free_device() | nci_cmd_work()
kfree(ndev)[3] | mod_timer(cmd_timer)[2]
In short, the cleanup routine thought that the cmd_timer has already
been detached by [1] but the mod_timer can re-attach the timer [2], even
it is already released [3], resulting in UAF.
This UAF is easy to trigger, crash trace by POC is like below
[ 66.703713] ==================================================================
[ 66.703974] BUG: KASAN: use-after-free in enqueue_timer+0x448/0x490
[ 66.703974] Write of size 8 at addr ffff888009fb7058 by task kworker/u4:1/33
[ 66.703974]
[ 66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 Not tainted 5.18.0-rc2 #5
[ 66.703974] Workqueue: nfc2_nci_cmd_wq nci_cmd_work
[ 66.703974] Call Trace:
[ 66.703974] <TASK>
[ 66.703974] dump_stack_lvl+0x57/0x7d
[ 66.703974] print_report.cold+0x5e/0x5db
[ 66.703974] ? enqueue_timer+0x448/0x490
[ 66.703974] kasan_report+0xbe/0x1c0
[ 66.703974] ? enqueue_timer+0x448/0x490
[ 66.703974] enqueue_timer+0x448/0x490
[ 66.703974] __mod_timer+0x5e6/0xb80
[ 66.703974] ? mark_held_locks+0x9e/0xe0
[ 66.703974] ? try_to_del_timer_sync+0xf0/0xf0
[ 66.703974] ? lockdep_hardirqs_on_prepare+0x17b/0x410
[ 66.703974] ? queue_work_on+0x61/0x80
[ 66.703974] ? lockdep_hardirqs_on+0xbf/0x130
[ 66.703974] process_one_work+0x8bb/0x1510
[ 66.703974] ? lockdep_hardirqs_on_prepare+0x410/0x410
[ 66.703974] ? pwq_dec_nr_in_flight+0x230/0x230
[ 66.703974] ? rwlock_bug.part.0+0x90/0x90
[ 66.703974] ? _raw_spin_lock_irq+0x41/0x50
[ 66.703974] worker_thread+0x575/0x1190
[ 66.703974] ? process_one_work+0x1510/0x1510
[ 66.703974] kthread+0x2a0/0x340
[ 66.703974] ? kthread_complete_and_exit+0x20/0x20
[ 66.703974] ret_from_fork+0x22/0x30
[ 66.703974] </TASK>
[ 66.703974]
[ 66.703974] Allocated by task 267:
[ 66.703974] kasan_save_stack+0x1e/0x40
[ 66.703974] __kasan_kmalloc+0x81/0xa0
[ 66.703974] nci_allocate_device+0xd3/0x390
[ 66.703974] nfcmrvl_nci_register_dev+0x183/0x2c0
[ 66.703974] nfcmrvl_nci_uart_open+0xf2/0x1dd
[ 66.703974] nci_uart_tty_ioctl+0x2c3/0x4a0
[ 66.703974] tty_ioctl+0x764/0x1310
[ 66.703974] __x64_sys_ioctl+0x122/0x190
[ 66.703974] do_syscall_64+0x3b/0x90
[ 66.703974] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 66.703974]
[ 66.703974] Freed by task 406:
[ 66.703974] kasan_save_stack+0x1e/0x40
[ 66.703974] kasan_set_track+0x21/0x30
[ 66.703974] kasan_set_free_info+0x20/0x30
[ 66.703974] __kasan_slab_free+0x108/0x170
[ 66.703974] kfree+0xb0/0x330
[ 66.703974] nfcmrvl_nci_unregister_dev+0x90/0xd0
[ 66.703974] nci_uart_tty_close+0xdf/0x180
[ 66.703974] tty_ldisc_kill+0x73/0x110
[ 66.703974] tty_ldisc_hangup+0x281/0x5b0
[ 66.703974] __tty_hangup.part.0+0x431/0x890
[ 66.703974] tty_release+0x3a8/0xc80
[ 66.703974] __fput+0x1f0/0x8c0
[ 66.703974] task_work_run+0xc9/0x170
[ 66.703974] exit_to_user_mode_prepare+0x194/0x1a0
[ 66.703974] syscall_exit_to_user_mode+0x19/0x50
[ 66.703974] do_syscall_64+0x48/0x90
[ 66.703974] entry_SYSCALL_64_after_hwframe+0x44/0x
---truncated---
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 17:59 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 7d3232214ca4ea8f7d18df264c3b254aa8089d7f
(git)
Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 9d243aff5f7e6b04e907c617426bbdf26e996ac8 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 1a1748d0dd0f0a98535c6baeef671c8722107639 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 5c63ad2b0a267a524c12c88acb1ba9c2d109a801 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 67677050cecbe0edfdd81cd508415e9636ba7c65 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < 9ded5ae40f4fe37fcc28f36d76bf45df20be5432 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < edd4600120641e1714e30112e69a548cfb68e067 (git) Affected: 6a2968aaf50c7a22fced77a5e24aa636281efca8 , < ef27324e2cb7bb24542d6cb2571740eefe6b00dc (git) |
|
| Linux | Linux |
Affected:
3.2
Unaffected: 0 , < 3.2 (semver) Unaffected: 4.9.311 , ≤ 4.9.* (semver) Unaffected: 4.14.276 , ≤ 4.14.* (semver) Unaffected: 4.19.239 , ≤ 4.19.* (semver) Unaffected: 5.4.190 , ≤ 5.4.* (semver) Unaffected: 5.10.112 , ≤ 5.10.* (semver) Unaffected: 5.15.35 , ≤ 5.15.* (semver) Unaffected: 5.17.4 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix) |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
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"id": "CVE-2022-49059",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T17:59:20.702464Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
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"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
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}
],
"providerMetadata": {
"dateUpdated": "2025-02-27T18:02:30.105Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/nfc/nci/core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
"versionType": "git"
},
{
"lessThan": "9d243aff5f7e6b04e907c617426bbdf26e996ac8",
"status": "affected",
"version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
"versionType": "git"
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{
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"versions": [
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{
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"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.311",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.239",
"versionType": "semver"
},
{
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"version": "5.4.190",
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{
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"version": "5.10.112",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.15.35",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.9.311",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.276",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.112",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.35",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.4",
"versionStartIncluding": "3.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18",
"versionStartIncluding": "3.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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] \u003cTASK\u003e\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] \u003c/TASK\u003e\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---"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T18:52:13.929Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7d3232214ca4ea8f7d18df264c3b254aa8089d7f"
},
{
"url": "https://git.kernel.org/stable/c/9d243aff5f7e6b04e907c617426bbdf26e996ac8"
},
{
"url": "https://git.kernel.org/stable/c/1a1748d0dd0f0a98535c6baeef671c8722107639"
},
{
"url": "https://git.kernel.org/stable/c/5c63ad2b0a267a524c12c88acb1ba9c2d109a801"
},
{
"url": "https://git.kernel.org/stable/c/67677050cecbe0edfdd81cd508415e9636ba7c65"
},
{
"url": "https://git.kernel.org/stable/c/9ded5ae40f4fe37fcc28f36d76bf45df20be5432"
},
{
"url": "https://git.kernel.org/stable/c/edd4600120641e1714e30112e69a548cfb68e067"
},
{
"url": "https://git.kernel.org/stable/c/ef27324e2cb7bb24542d6cb2571740eefe6b00dc"
}
],
"title": "nfc: nci: add flush_workqueue to prevent uaf",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49059",
"datePublished": "2025-02-26T01:54:29.819Z",
"dateReserved": "2025-02-26T01:49:39.243Z",
"dateUpdated": "2026-05-11T18:52:13.929Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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