{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23372",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-23372"
  ],
  "published": "2026-03-25T10:28:03Z",
  "summary": "nfc: rawsock: cancel tx_work before socket teardown",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: rawsock: cancel tx_work before socket teardown\n\nIn rawsock_release(), cancel any pending tx_work and purge the write\nqueue before orphaning the socket.  rawsock_tx_work runs on the system\nworkqueue and calls nfc_data_exchange which dereferences the NCI\ndevice.  Without synchronization, tx_work can race with socket and\ndevice teardown when a process is killed (e.g. by SIGKILL), leading\nto use-after-free or leaked references.\n\nSet SEND_SHUTDOWN first so that if tx_work is already running it will\nsee the flag and skip transmitting, then use cancel_work_sync to wait\nfor any in-progress execution to finish, and finally purge any\nremaining queued skbs.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23372"
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      "scenario": "AV:L - The attacker needs local access to create an AF_NFC socket and perform socket operations (connect, sendmsg, close). NFC is the affected subsystem but the exploit entry is through local syscalls.\nAC:L - The attacker controls both sides of the race \u2014 they schedule tx_work via sendmsg() then immediately close the socket. The race is reliably triggerable by the attacker.\nPR:L - Creating a SOCK_SEQPACKET NFC socket requires no capabilities (only SOCK_RAW requires CAP_NET_RAW). Any unprivileged local user in the init network namespace can create and use these sockets.\nUI:N - No user interaction needed. The attacker opens, connects, sends, and closes the NFC socket entirely on their own.\nS:U - Standard kernel use-after-free within the same security authority (kernel privilege escalation). No cross-boundary escape such as VM or sandbox escape.\nC:H - UAF on a struct containing function pointers (nfc_dev with dev->ops) allows an attacker to read arbitrary kernel memory via heap spray techniques placing controlled data in the freed allocation.\nI:H - The UAF dereferences dev->ops->im_transceive, a function pointer on freed memory. Via heap spraying, the attacker can hijack this function pointer to achieve arbitrary code execution in kernel context.\nA:H - Use-after-free on kernel objects causes kernel crash/oops when the freed memory is dereferenced, leading to denial of service."
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}