{"id":"CVE-2026-90224","published":"2026-09-17T17:17:17.997","lastModified":"2026-09-18T18:17:47.140","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix double completion race in nci_data_exchange_complete\n\nnci_close_device() and nci_rx_work can both call\nnci_data_exchange_complete() concurrently.  After commit 4527025d440ce8\n(\"nfc: nci: fix circular locking dependency in nci_close_device\") moved\nflush_workqueue(ndev->rx_wq) after mutex_unlock(&ndev->req_lock),\nrx_work is no longer serialized with the explicit completion call in the\nclose path.  Both callers read the non-NULL callback pointer and invoke\nrawsock_data_exchange_complete(), which calls sock_put() -- but only one\nsock_hold() was taken, so the second sock_put() underflows the refcount\nand frees the socket while it is still in use.\n\nReplace the bare clear_bit(NCI_DATA_EXCHANGE) with\ntest_and_clear_bit() so that only the first caller proceeds to invoke\nthe callback.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/3f075832734005310740d148d1cf1c1e792ebdca","tags":[]},{"url":"https://git.kernel.org/stable/c/588ccd19a6e69eca72d54608c3ab3b45709b2305","tags":[]},{"url":"https://git.kernel.org/stable/c/8265a626cc14a48e46e6dc8c47667e72b4232ac2","tags":[]},{"url":"https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e54cef462d159b5248f09fd2","tags":[]},{"url":"https://git.kernel.org/stable/c/ba4c776af3dc21ed04e315e6545e99703bb1b53a","tags":[]},{"url":"https://git.kernel.org/stable/c/bfdf412208fea7fc0d5b32d68a35b25261917393","tags":[]},{"url":"https://git.kernel.org/stable/c/cf646a9f5554bc07d6ccb59c327812b3a0c6a368","tags":[]},{"url":"https://git.kernel.org/stable/c/ee08414d78b851e3d1856d6e4d631939b01a1bbe","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}