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EUVD-2026-345119
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 07:59
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": "2026-10-02T07:59:57.419121+00:00",
"id": "EUVD-2026-345119"
}
CVE-2023-53023 (GCVE-0-2023-53023)
Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-08-05 09:12
VLAI
EPSS
VEX
Title
net: nfc: Fix use-after-free in local_cleanup()
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: nfc: Fix use-after-free in local_cleanup()
Fix a use-after-free that occurs in kfree_skb() called from
local_cleanup(). This could happen when killing nfc daemon (e.g. neard)
after detaching an nfc device.
When detaching an nfc device, local_cleanup() called from
nfc_llcp_unregister_device() frees local->rx_pending and decreases
local->ref by kref_put() in nfc_llcp_local_put().
In the terminating process, nfc daemon releases all sockets and it leads
to decreasing local->ref. After the last release of local->ref,
local_cleanup() called from local_release() frees local->rx_pending
again, which leads to the bug.
Setting local->rx_pending to NULL in local_cleanup() could prevent
use-after-free when local_cleanup() is called twice.
Found by a modified version of syzkaller.
BUG: KASAN: use-after-free in kfree_skb()
Call Trace:
dump_stack_lvl (lib/dump_stack.c:106)
print_address_description.constprop.0.cold (mm/kasan/report.c:306)
kasan_check_range (mm/kasan/generic.c:189)
kfree_skb (net/core/skbuff.c:955)
local_cleanup (net/nfc/llcp_core.c:159)
nfc_llcp_local_put.part.0 (net/nfc/llcp_core.c:172)
nfc_llcp_local_put (net/nfc/llcp_core.c:181)
llcp_sock_destruct (net/nfc/llcp_sock.c:959)
__sk_destruct (net/core/sock.c:2133)
sk_destruct (net/core/sock.c:2181)
__sk_free (net/core/sock.c:2192)
sk_free (net/core/sock.c:2203)
llcp_sock_release (net/nfc/llcp_sock.c:646)
__sock_release (net/socket.c:650)
sock_close (net/socket.c:1365)
__fput (fs/file_table.c:306)
task_work_run (kernel/task_work.c:179)
ptrace_notify (kernel/signal.c:2354)
syscall_exit_to_user_mode_prepare (kernel/entry/common.c:278)
syscall_exit_to_user_mode (kernel/entry/common.c:296)
do_syscall_64 (arch/x86/entry/common.c:86)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:106)
Allocated by task 4719:
kasan_save_stack (mm/kasan/common.c:45)
__kasan_slab_alloc (mm/kasan/common.c:325)
slab_post_alloc_hook (mm/slab.h:766)
kmem_cache_alloc_node (mm/slub.c:3497)
__alloc_skb (net/core/skbuff.c:552)
pn533_recv_response (drivers/nfc/pn533/usb.c:65)
__usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1671)
usb_giveback_urb_bh (drivers/usb/core/hcd.c:1704)
tasklet_action_common.isra.0 (kernel/softirq.c:797)
__do_softirq (kernel/softirq.c:571)
Freed by task 1901:
kasan_save_stack (mm/kasan/common.c:45)
kasan_set_track (mm/kasan/common.c:52)
kasan_save_free_info (mm/kasan/genericdd.c:518)
__kasan_slab_free (mm/kasan/common.c:236)
kmem_cache_free (mm/slub.c:3809)
kfree_skbmem (net/core/skbuff.c:874)
kfree_skb (net/core/skbuff.c:931)
local_cleanup (net/nfc/llcp_core.c:159)
nfc_llcp_unregister_device (net/nfc/llcp_core.c:1617)
nfc_unregister_device (net/nfc/core.c:1179)
pn53x_unregister_nfc (drivers/nfc/pn533/pn533.c:2846)
pn533_usb_disconnect (drivers/nfc/pn533/usb.c:579)
usb_unbind_interface (drivers/usb/core/driver.c:458)
device_release_driver_internal (drivers/base/dd.c:1279)
bus_remove_device (drivers/base/bus.c:529)
device_del (drivers/base/core.c:3665)
usb_disable_device (drivers/usb/core/message.c:1420)
usb_disconnect (drivers/usb/core.c:2261)
hub_event (drivers/usb/core/hub.c:5833)
process_one_work (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:212 include/trace/events/workqueue.h:108 kernel/workqueue.c:2281)
worker_thread (include/linux/list.h:282 kernel/workqueue.c:2423)
kthread (kernel/kthread.c:319)
ret_from_fork (arch/x86/entry/entry_64.S:301)
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-27 17:01 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < b09ae26f08aaf2d85f96ea7f90ddd3387f62216f
(git)
Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < 54f7be61584b8ec4c6df405f479495b9397bae4a (git) Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < a59cdbda3714e11aa3ab579132864c4c8c6d54f9 (git) Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < ad1baab3a5c03692d22ce446f38596a126377f6a (git) Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < 7f129927feaf7c10b1c38bbce630172e9a08c834 (git) Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < d3605282ec3502ec8847915eb2cf1f340493ff79 (git) Affected: 3536da06db0baa675f32de608c0a4c0f5ef0e9ff , < 4bb4db7f3187c6e3de6b229ffc87cdb30a2d22b6 (git) |
|
| Linux | Linux |
Affected:
3.9
Unaffected: 0 , < 3.9 (semver) Unaffected: 4.14.305 , ≤ 4.14.* (semver) Unaffected: 4.19.272 , ≤ 4.19.* (semver) Unaffected: 5.4.231 , ≤ 5.4.* (semver) Unaffected: 5.10.166 , ≤ 5.10.* (semver) Unaffected: 5.15.91 , ≤ 5.15.* (semver) Unaffected: 6.1.9 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (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": {
"content": {
"id": "CVE-2023-53023",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-27T17:01:08.115465Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-03-27T17:08:23.496Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/nfc/llcp_core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b09ae26f08aaf2d85f96ea7f90ddd3387f62216f",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "54f7be61584b8ec4c6df405f479495b9397bae4a",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "a59cdbda3714e11aa3ab579132864c4c8c6d54f9",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "ad1baab3a5c03692d22ce446f38596a126377f6a",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "7f129927feaf7c10b1c38bbce630172e9a08c834",
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"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "d3605282ec3502ec8847915eb2cf1f340493ff79",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
},
{
"lessThan": "4bb4db7f3187c6e3de6b229ffc87cdb30a2d22b6",
"status": "affected",
"version": "3536da06db0baa675f32de608c0a4c0f5ef0e9ff",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/nfc/llcp_core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"lessThan": "3.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.305",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.272",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.231",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.166",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.91",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.305",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.272",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.231",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.166",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.91",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.9",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "3.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nfc: Fix use-after-free in local_cleanup()\n\nFix a use-after-free that occurs in kfree_skb() called from\nlocal_cleanup(). This could happen when killing nfc daemon (e.g. neard)\nafter detaching an nfc device.\nWhen detaching an nfc device, local_cleanup() called from\nnfc_llcp_unregister_device() frees local-\u003erx_pending and decreases\nlocal-\u003eref by kref_put() in nfc_llcp_local_put().\nIn the terminating process, nfc daemon releases all sockets and it leads\nto decreasing local-\u003eref. After the last release of local-\u003eref,\nlocal_cleanup() called from local_release() frees local-\u003erx_pending\nagain, which leads to the bug.\n\nSetting local-\u003erx_pending to NULL in local_cleanup() could prevent\nuse-after-free when local_cleanup() is called twice.\n\nFound by a modified version of syzkaller.\n\nBUG: KASAN: use-after-free in kfree_skb()\n\nCall Trace:\ndump_stack_lvl (lib/dump_stack.c:106)\nprint_address_description.constprop.0.cold (mm/kasan/report.c:306)\nkasan_check_range (mm/kasan/generic.c:189)\nkfree_skb (net/core/skbuff.c:955)\nlocal_cleanup (net/nfc/llcp_core.c:159)\nnfc_llcp_local_put.part.0 (net/nfc/llcp_core.c:172)\nnfc_llcp_local_put (net/nfc/llcp_core.c:181)\nllcp_sock_destruct (net/nfc/llcp_sock.c:959)\n__sk_destruct (net/core/sock.c:2133)\nsk_destruct (net/core/sock.c:2181)\n__sk_free (net/core/sock.c:2192)\nsk_free (net/core/sock.c:2203)\nllcp_sock_release (net/nfc/llcp_sock.c:646)\n__sock_release (net/socket.c:650)\nsock_close (net/socket.c:1365)\n__fput (fs/file_table.c:306)\ntask_work_run (kernel/task_work.c:179)\nptrace_notify (kernel/signal.c:2354)\nsyscall_exit_to_user_mode_prepare (kernel/entry/common.c:278)\nsyscall_exit_to_user_mode (kernel/entry/common.c:296)\ndo_syscall_64 (arch/x86/entry/common.c:86)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:106)\n\nAllocated by task 4719:\nkasan_save_stack (mm/kasan/common.c:45)\n__kasan_slab_alloc (mm/kasan/common.c:325)\nslab_post_alloc_hook (mm/slab.h:766)\nkmem_cache_alloc_node (mm/slub.c:3497)\n__alloc_skb (net/core/skbuff.c:552)\npn533_recv_response (drivers/nfc/pn533/usb.c:65)\n__usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1671)\nusb_giveback_urb_bh (drivers/usb/core/hcd.c:1704)\ntasklet_action_common.isra.0 (kernel/softirq.c:797)\n__do_softirq (kernel/softirq.c:571)\n\nFreed by task 1901:\nkasan_save_stack (mm/kasan/common.c:45)\nkasan_set_track (mm/kasan/common.c:52)\nkasan_save_free_info (mm/kasan/genericdd.c:518)\n__kasan_slab_free (mm/kasan/common.c:236)\nkmem_cache_free (mm/slub.c:3809)\nkfree_skbmem (net/core/skbuff.c:874)\nkfree_skb (net/core/skbuff.c:931)\nlocal_cleanup (net/nfc/llcp_core.c:159)\nnfc_llcp_unregister_device (net/nfc/llcp_core.c:1617)\nnfc_unregister_device (net/nfc/core.c:1179)\npn53x_unregister_nfc (drivers/nfc/pn533/pn533.c:2846)\npn533_usb_disconnect (drivers/nfc/pn533/usb.c:579)\nusb_unbind_interface (drivers/usb/core/driver.c:458)\ndevice_release_driver_internal (drivers/base/dd.c:1279)\nbus_remove_device (drivers/base/bus.c:529)\ndevice_del (drivers/base/core.c:3665)\nusb_disable_device (drivers/usb/core/message.c:1420)\nusb_disconnect (drivers/usb/core.c:2261)\nhub_event (drivers/usb/core/hub.c:5833)\nprocess_one_work (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:212 include/trace/events/workqueue.h:108 kernel/workqueue.c:2281)\nworker_thread (include/linux/list.h:282 kernel/workqueue.c:2423)\nkthread (kernel/kthread.c:319)\nret_from_fork (arch/x86/entry/entry_64.S:301)"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The UAF is completed via local AF_NFC LLCP socket teardown (sock_close \u2192 llcp_sock_destruct \u2192 nfc_llcp_local_put \u2192 local_cleanup), not by processing frames from a remote/adjacent peer alone; device unregister is a local/host-side event (USB NFC disconnect, driver remove).\nAC:L - An attacker who holds LLCP sockets can deterministically force the second local_cleanup after unregister, and can arrange a non-NULL rx_pending (NFC traffic or active link) so the dangling pointer is double-freed; this is sequential logic, not an uncontrollable race.\nPR:L - PF_NFC LLCP SOCK_STREAM/SOCK_DGRAM creation and bind need no capabilities (only SOCK_RAW checks CAP_NET_RAW), so an unprivileged local user can hold local refs and trigger the second free on close.\nUI:N - Exploitation requires only attacker-controlled socket lifecycle plus device unregister; no separate victim action such as opening a file or confirming a prompt is required.\nS:U - The bug corrupts kernel heap state within the same host kernel authority and does not cross VM, IOMMU, or sandbox boundaries.\nC:H - Double-free/UAF of the rx_pending sk_buff enables heap reuse and disclosure of freed kernel object contents, so confidentiality impact is High per UAF guidance.\nI:H - The same sk_buff UAF supports heap spraying and corruption of the reused object, enabling arbitrary write/control-flow hijack primitives.\nA:H - kfree_skb on the dangling rx_pending pointer causes kernel KASAN/UAF crashes and oops even when not fully exploited for code execution."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T09:12:24.049Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b09ae26f08aaf2d85f96ea7f90ddd3387f62216f"
},
{
"url": "https://git.kernel.org/stable/c/54f7be61584b8ec4c6df405f479495b9397bae4a"
},
{
"url": "https://git.kernel.org/stable/c/a59cdbda3714e11aa3ab579132864c4c8c6d54f9"
},
{
"url": "https://git.kernel.org/stable/c/ad1baab3a5c03692d22ce446f38596a126377f6a"
},
{
"url": "https://git.kernel.org/stable/c/7f129927feaf7c10b1c38bbce630172e9a08c834"
},
{
"url": "https://git.kernel.org/stable/c/d3605282ec3502ec8847915eb2cf1f340493ff79"
},
{
"url": "https://git.kernel.org/stable/c/4bb4db7f3187c6e3de6b229ffc87cdb30a2d22b6"
}
],
"title": "net: nfc: Fix use-after-free in local_cleanup()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-53023",
"datePublished": "2025-03-27T16:43:49.142Z",
"dateReserved": "2025-03-27T16:40:15.753Z",
"dateUpdated": "2026-08-05T09:12:24.049Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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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