CVE-2026-23150 (GCVE-0-2026-23150)
Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-02-14 16:01
VLAI?
Title
nfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().
syzbot reported various memory leaks related to NFC, struct
nfc_llcp_sock, sk_buff, nfc_dev, etc. [0]
The leading log hinted that nfc_llcp_send_ui_frame() failed
to allocate skb due to sock_error(sk) being -ENXIO.
ENXIO is set by nfc_llcp_socket_release() when struct
nfc_llcp_local is destroyed by local_cleanup().
The problem is that there is no synchronisation between
nfc_llcp_send_ui_frame() and local_cleanup(), and skb
could be put into local->tx_queue after it was purged in
local_cleanup():
CPU1 CPU2
---- ----
nfc_llcp_send_ui_frame() local_cleanup()
|- do { '
|- pdu = nfc_alloc_send_skb(..., &err)
| .
| |- nfc_llcp_socket_release(local, false, ENXIO);
| |- skb_queue_purge(&local->tx_queue); |
| ' |
|- skb_queue_tail(&local->tx_queue, pdu); |
... |
|- pdu = nfc_alloc_send_skb(..., &err) |
^._________________________________.'
local_cleanup() is called for struct nfc_llcp_local only
after nfc_llcp_remove_local() unlinks it from llcp_devices.
If we hold local->tx_queue.lock then, we can synchronise
the thread and nfc_llcp_send_ui_frame().
Let's do that and check list_empty(&local->list) before
queuing skb to local->tx_queue in nfc_llcp_send_ui_frame().
[0]:
[ 56.074943][ T6096] llcp: nfc_llcp_send_ui_frame: Could not allocate PDU (error=-6)
[ 64.318868][ T5813] kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff8881272f6800 (size 1024):
comm "syz.0.17", pid 6096, jiffies 4294942766
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
27 00 03 40 00 00 00 00 00 00 00 00 00 00 00 00 '..@............
backtrace (crc da58d84d):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4979 [inline]
slab_alloc_node mm/slub.c:5284 [inline]
__do_kmalloc_node mm/slub.c:5645 [inline]
__kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5658
kmalloc_noprof include/linux/slab.h:961 [inline]
sk_prot_alloc+0x11a/0x1b0 net/core/sock.c:2239
sk_alloc+0x36/0x360 net/core/sock.c:2295
nfc_llcp_sock_alloc+0x37/0x130 net/nfc/llcp_sock.c:979
llcp_sock_create+0x71/0xd0 net/nfc/llcp_sock.c:1044
nfc_sock_create+0xc9/0xf0 net/nfc/af_nfc.c:31
__sock_create+0x1a9/0x340 net/socket.c:1605
sock_create net/socket.c:1663 [inline]
__sys_socket_create net/socket.c:1700 [inline]
__sys_socket+0xb9/0x1a0 net/socket.c:1747
__do_sys_socket net/socket.c:1761 [inline]
__se_sys_socket net/socket.c:1759 [inline]
__x64_sys_socket+0x1b/0x30 net/socket.c:1759
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810fbd9800 (size 240):
comm "syz.0.17", pid 6096, jiffies 4294942850
hex dump (first 32 bytes):
68 f0 ff 08 81 88 ff ff 68 f0 ff 08 81 88 ff ff h.......h.......
00 00 00 00 00 00 00 00 00 68 2f 27 81 88 ff ff .........h/'....
backtrace (crc 6cc652b1):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4979 [inline]
slab_alloc_node mm/slub.c:5284 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5336
__alloc_skb+0x203/0x240 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1383 [inline]
alloc_skb_with_frags+0x69/0x3f0 net/core/sk
---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
94f418a206648c9be6fd84d6681d6956b8f8b106 , < ab660cb8e17aa93426d1e821c2cce60e4b9bc56a
(git)
Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < 65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc (git) Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < 6734ff1ac6beba1d0c22dc9a3dc1849b773b511f (git) Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < f8d002626d434f5fea9085e2557711c16a15cec6 (git) Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < 3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5 (git) Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < 61858cbce6ca4bef9ed116c689a4be9520841339 (git) Affected: 94f418a206648c9be6fd84d6681d6956b8f8b106 , < 165c34fb6068ff153e3fc99a932a80a9d5755709 (git) |
|||||||
|
|||||||||
{
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"programFiles": [
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],
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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},
{
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{
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"version": "6.1.162",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.123",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.69",
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{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.9",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"vulnerable": true
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{
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"negate": false,
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}
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().\n\nsyzbot reported various memory leaks related to NFC, struct\nnfc_llcp_sock, sk_buff, nfc_dev, etc. [0]\n\nThe leading log hinted that nfc_llcp_send_ui_frame() failed\nto allocate skb due to sock_error(sk) being -ENXIO.\n\nENXIO is set by nfc_llcp_socket_release() when struct\nnfc_llcp_local is destroyed by local_cleanup().\n\nThe problem is that there is no synchronisation between\nnfc_llcp_send_ui_frame() and local_cleanup(), and skb\ncould be put into local-\u003etx_queue after it was purged in\nlocal_cleanup():\n\n CPU1 CPU2\n ---- ----\n nfc_llcp_send_ui_frame() local_cleanup()\n |- do { \u0027\n |- pdu = nfc_alloc_send_skb(..., \u0026err)\n | .\n | |- nfc_llcp_socket_release(local, false, ENXIO);\n | |- skb_queue_purge(\u0026local-\u003etx_queue); |\n | \u0027 |\n |- skb_queue_tail(\u0026local-\u003etx_queue, pdu); |\n ... |\n |- pdu = nfc_alloc_send_skb(..., \u0026err) |\n ^._________________________________.\u0027\n\nlocal_cleanup() is called for struct nfc_llcp_local only\nafter nfc_llcp_remove_local() unlinks it from llcp_devices.\n\nIf we hold local-\u003etx_queue.lock then, we can synchronise\nthe thread and nfc_llcp_send_ui_frame().\n\nLet\u0027s do that and check list_empty(\u0026local-\u003elist) before\nqueuing skb to local-\u003etx_queue in nfc_llcp_send_ui_frame().\n\n[0]:\n[ 56.074943][ T6096] llcp: nfc_llcp_send_ui_frame: Could not allocate PDU (error=-6)\n[ 64.318868][ T5813] kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\nBUG: memory leak\nunreferenced object 0xffff8881272f6800 (size 1024):\n comm \"syz.0.17\", pid 6096, jiffies 4294942766\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 27 00 03 40 00 00 00 00 00 00 00 00 00 00 00 00 \u0027..@............\n backtrace (crc da58d84d):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4979 [inline]\n slab_alloc_node mm/slub.c:5284 [inline]\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5658\n kmalloc_noprof include/linux/slab.h:961 [inline]\n sk_prot_alloc+0x11a/0x1b0 net/core/sock.c:2239\n sk_alloc+0x36/0x360 net/core/sock.c:2295\n nfc_llcp_sock_alloc+0x37/0x130 net/nfc/llcp_sock.c:979\n llcp_sock_create+0x71/0xd0 net/nfc/llcp_sock.c:1044\n nfc_sock_create+0xc9/0xf0 net/nfc/af_nfc.c:31\n __sock_create+0x1a9/0x340 net/socket.c:1605\n sock_create net/socket.c:1663 [inline]\n __sys_socket_create net/socket.c:1700 [inline]\n __sys_socket+0xb9/0x1a0 net/socket.c:1747\n __do_sys_socket net/socket.c:1761 [inline]\n __se_sys_socket net/socket.c:1759 [inline]\n __x64_sys_socket+0x1b/0x30 net/socket.c:1759\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nBUG: memory leak\nunreferenced object 0xffff88810fbd9800 (size 240):\n comm \"syz.0.17\", pid 6096, jiffies 4294942850\n hex dump (first 32 bytes):\n 68 f0 ff 08 81 88 ff ff 68 f0 ff 08 81 88 ff ff h.......h.......\n 00 00 00 00 00 00 00 00 00 68 2f 27 81 88 ff ff .........h/\u0027....\n backtrace (crc 6cc652b1):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4979 [inline]\n slab_alloc_node mm/slub.c:5284 [inline]\n kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5336\n __alloc_skb+0x203/0x240 net/core/skbuff.c:660\n alloc_skb include/linux/skbuff.h:1383 [inline]\n alloc_skb_with_frags+0x69/0x3f0 net/core/sk\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2026-02-14T16:01:18.968Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ab660cb8e17aa93426d1e821c2cce60e4b9bc56a"
},
{
"url": "https://git.kernel.org/stable/c/65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc"
},
{
"url": "https://git.kernel.org/stable/c/6734ff1ac6beba1d0c22dc9a3dc1849b773b511f"
},
{
"url": "https://git.kernel.org/stable/c/f8d002626d434f5fea9085e2557711c16a15cec6"
},
{
"url": "https://git.kernel.org/stable/c/3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5"
},
{
"url": "https://git.kernel.org/stable/c/61858cbce6ca4bef9ed116c689a4be9520841339"
},
{
"url": "https://git.kernel.org/stable/c/165c34fb6068ff153e3fc99a932a80a9d5755709"
}
],
"title": "nfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23150",
"datePublished": "2026-02-14T16:01:18.968Z",
"dateReserved": "2026-01-13T15:37:45.976Z",
"dateUpdated": "2026-02-14T16:01:18.968Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23150\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T16:15:55.123\",\"lastModified\":\"2026-02-14T16:15:55.123\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnfc: llcp: Fix memleak in nfc_llcp_send_ui_frame().\\n\\nsyzbot reported various memory leaks related to NFC, struct\\nnfc_llcp_sock, sk_buff, nfc_dev, etc. [0]\\n\\nThe leading log hinted that nfc_llcp_send_ui_frame() failed\\nto allocate skb due to sock_error(sk) being -ENXIO.\\n\\nENXIO is set by nfc_llcp_socket_release() when struct\\nnfc_llcp_local is destroyed by local_cleanup().\\n\\nThe problem is that there is no synchronisation between\\nnfc_llcp_send_ui_frame() and local_cleanup(), and skb\\ncould be put into local-\u003etx_queue after it was purged in\\nlocal_cleanup():\\n\\n CPU1 CPU2\\n ---- ----\\n nfc_llcp_send_ui_frame() local_cleanup()\\n |- do { \u0027\\n |- pdu = nfc_alloc_send_skb(..., \u0026err)\\n | .\\n | |- nfc_llcp_socket_release(local, false, ENXIO);\\n | |- skb_queue_purge(\u0026local-\u003etx_queue); |\\n | \u0027 |\\n |- skb_queue_tail(\u0026local-\u003etx_queue, pdu); |\\n ... |\\n |- pdu = nfc_alloc_send_skb(..., \u0026err) |\\n ^._________________________________.\u0027\\n\\nlocal_cleanup() is called for struct nfc_llcp_local only\\nafter nfc_llcp_remove_local() unlinks it from llcp_devices.\\n\\nIf we hold local-\u003etx_queue.lock then, we can synchronise\\nthe thread and nfc_llcp_send_ui_frame().\\n\\nLet\u0027s do that and check list_empty(\u0026local-\u003elist) before\\nqueuing skb to local-\u003etx_queue in nfc_llcp_send_ui_frame().\\n\\n[0]:\\n[ 56.074943][ T6096] llcp: nfc_llcp_send_ui_frame: Could not allocate PDU (error=-6)\\n[ 64.318868][ T5813] kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\\nBUG: memory leak\\nunreferenced object 0xffff8881272f6800 (size 1024):\\n comm \\\"syz.0.17\\\", pid 6096, jiffies 4294942766\\n hex dump (first 32 bytes):\\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\\n 27 00 03 40 00 00 00 00 00 00 00 00 00 00 00 00 \u0027..@............\\n backtrace (crc da58d84d):\\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\\n slab_post_alloc_hook mm/slub.c:4979 [inline]\\n slab_alloc_node mm/slub.c:5284 [inline]\\n __do_kmalloc_node mm/slub.c:5645 [inline]\\n __kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5658\\n kmalloc_noprof include/linux/slab.h:961 [inline]\\n sk_prot_alloc+0x11a/0x1b0 net/core/sock.c:2239\\n sk_alloc+0x36/0x360 net/core/sock.c:2295\\n nfc_llcp_sock_alloc+0x37/0x130 net/nfc/llcp_sock.c:979\\n llcp_sock_create+0x71/0xd0 net/nfc/llcp_sock.c:1044\\n nfc_sock_create+0xc9/0xf0 net/nfc/af_nfc.c:31\\n __sock_create+0x1a9/0x340 net/socket.c:1605\\n sock_create net/socket.c:1663 [inline]\\n __sys_socket_create net/socket.c:1700 [inline]\\n __sys_socket+0xb9/0x1a0 net/socket.c:1747\\n __do_sys_socket net/socket.c:1761 [inline]\\n __se_sys_socket net/socket.c:1759 [inline]\\n __x64_sys_socket+0x1b/0x30 net/socket.c:1759\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nBUG: memory leak\\nunreferenced object 0xffff88810fbd9800 (size 240):\\n comm \\\"syz.0.17\\\", pid 6096, jiffies 4294942850\\n hex dump (first 32 bytes):\\n 68 f0 ff 08 81 88 ff ff 68 f0 ff 08 81 88 ff ff h.......h.......\\n 00 00 00 00 00 00 00 00 00 68 2f 27 81 88 ff ff .........h/\u0027....\\n backtrace (crc 6cc652b1):\\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\\n slab_post_alloc_hook mm/slub.c:4979 [inline]\\n slab_alloc_node mm/slub.c:5284 [inline]\\n kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5336\\n __alloc_skb+0x203/0x240 net/core/skbuff.c:660\\n alloc_skb include/linux/skbuff.h:1383 [inline]\\n alloc_skb_with_frags+0x69/0x3f0 net/core/sk\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/165c34fb6068ff153e3fc99a932a80a9d5755709\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61858cbce6ca4bef9ed116c689a4be9520841339\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6734ff1ac6beba1d0c22dc9a3dc1849b773b511f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab660cb8e17aa93426d1e821c2cce60e4b9bc56a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f8d002626d434f5fea9085e2557711c16a15cec6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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