Vulnerability-Lookup

CVE-2026-23150 (GCVE-0-2026-23150)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-05-11 22:01

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

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/ab660cb8e17aa9342…
https://git.kernel.org/stable/c/65e976e1f474ae3bf…
https://git.kernel.org/stable/c/6734ff1ac6beba1d0…
https://git.kernel.org/stable/c/f8d002626d434f5fe…
https://git.kernel.org/stable/c/3098e5c8af0f4c8f7…
https://git.kernel.org/stable/c/61858cbce6ca4bef9…
https://git.kernel.org/stable/c/165c34fb6068ff153…

Impacted products

2 products

Vendor	Product	Version	CPE status
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)	guessed
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 5.10.249 , ≤ 5.10.* (semver) Unaffected: 5.15.199 , ≤ 5.15.* (semver) Unaffected: 6.1.162 , ≤ 6.1.* (semver) Unaffected: 6.6.123 , ≤ 6.6.* (semver) Unaffected: 6.12.69 , ≤ 6.12.* (semver) Unaffected: 6.18.9 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/llcp_commands.c",
            "net/nfc/llcp_core.c"
          ],
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            "net/nfc/llcp_core.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "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",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.249",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.199",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.162",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.123",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.69",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.9",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-05-11T22:01:10.727Z",
        "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": "2026-05-11T22:01:10.727Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23150",
      "date": "2026-09-17",
      "epss": "0.00119",
      "percentile": "0.02007"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23150\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T16:15:55.123\",\"lastModified\":\"2026-06-17T10:20:59.510\",\"vulnStatus\":\"Analyzed\",\"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---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnfc: llcp: Correcci\u00f3n de fuga de memoria en nfc_llcp_send_ui_frame().\\n\\nsyzbot inform\u00f3 de varias fugas de memoria relacionadas con NFC, struct\\nnfc_llcp_sock, sk_buff, nfc_dev, etc. [0]\\n\\nEl registro principal sugiri\u00f3 que nfc_llcp_send_ui_frame() fall\u00f3\\nal asignar skb debido a que sock_error(sk) era -ENXIO.\\n\\nENXIO es establecido por nfc_llcp_socket_release() cuando struct\\nnfc_llcp_local es destruido por local_cleanup().\\n\\nEl problema es que no hay sincronizaci\u00f3n entre\\nnfc_llcp_send_ui_frame() y local_cleanup(), y skb\\npodr\u00eda ser puesto en local-\u0026gt;tx_queue despu\u00e9s de que fuera purgado en\\nlocal_cleanup():\\n\\n  CPU1                          CPU2\\n  ----                          ----\\n  nfc_llcp_send_ui_frame()      local_cleanup()\\n  |- do {                       \u0027\\n     |- pdu = nfc_alloc_send_skb(..., \u0026amp;err)\\n     |                          .\\n     |                          |- nfc_llcp_socket_release(local, false, ENXIO);\\n     |                          |- skb_queue_purge(\u0026amp;local-\u0026gt;tx_queue);      |\\n     |                          \u0027                                          |\\n     |- skb_queue_tail(\u0026amp;local-\u0026gt;tx_queue, pdu);                             |\\n    ...                                                                    |\\n     |- pdu = nfc_alloc_send_skb(..., \u0026amp;err)                                |\\n                                       ^._________________________________.\u0027\\n\\nlocal_cleanup() es llamado para struct nfc_llcp_local solo\\ndespu\u00e9s de que nfc_llcp_remove_local() lo desvincula de llcp_devices.\\n\\nSi mantenemos local-\u0026gt;tx_queue.lock entonces, podemos sincronizar\\nel hilo y nfc_llcp_send_ui_frame().\\n\\nHagamos eso y verifiquemos list_empty(\u0026amp;local-\u0026gt;list) antes\\nde encolar skb en local-\u0026gt;tx_queue en 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 \u0027syz.0.17\u0027, 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 \u0027syz.0.17\u0027, 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---tru\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/nfc/llcp_commands.c\",\"net/nfc/llcp_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"ab660cb8e17aa93426d1e821c2cce60e4b9bc56a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"6734ff1ac6beba1d0c22dc9a3dc1849b773b511f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"f8d002626d434f5fea9085e2557711c16a15cec6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"61858cbce6ca4bef9ed116c689a4be9520841339\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"94f418a206648c9be6fd84d6681d6956b8f8b106\",\"lessThan\":\"165c34fb6068ff153e3fc99a932a80a9d5755709\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/nfc/llcp_commands.c\",\"net/nfc/llcp_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.249\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.199\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.162\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.123\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.69\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.9\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.8\",\"versionEndExcluding\":\"5.10.249\",\"matchCriteriaId\":\"C1D3B462-A229-4130-A191-F09550344C59\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.199\",\"matchCriteriaId\":\"A247FBA6-BEB9-484F-B892-DD5517949CCD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.162\",\"matchCriteriaId\":\"6579E0D4-0641-479D-A4C3-0EF618798C55\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.123\",\"matchCriteriaId\":\"316D8D4E-FE44-4C76-8403-63CAF51EEFC2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.69\",\"matchCriteriaId\":\"3F0D11B0-A3DA-4D8F-89B9-CFD2094EBA37\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.9\",\"matchCriteriaId\":\"171CFCB2-8F49-4F9E-8A67-FAC6BF45B5A2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/165c34fb6068ff153e3fc99a932a80a9d5755709\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3098e5c8af0f4c8f7eebbb370798df8aa2e12ba5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/61858cbce6ca4bef9ed116c689a4be9520841339\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/65e976e1f474ae3bf5681d7abafb8f3fdb34b8cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6734ff1ac6beba1d0c22dc9a3dc1849b773b511f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ab660cb8e17aa93426d1e821c2cce60e4b9bc56a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f8d002626d434f5fea9085e2557711c16a15cec6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T06:25:12+00:00",
      "cve": "CVE-2026-23150",
      "id": "CVE-2026-23150",
      "initial_release_date": "2026-02-14T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nfc: llcp: Fix memleak in nfc_llcp_send_ui_frame()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23150.json",
      "version": "3"
    }
  }
}

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.

Detection rules are retrieved from Rulezet.

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.

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.

Action not permitted

CVE-2026-23150 (GCVE-0-2026-23150)

Tags

Sightings

Nomenclature

Related by attack behaviour