CVE-2026-90224

Summary

In the Linux kernel, the following vulnerability has been resolved:

nfc: nci: fix double completion race in nci_data_exchange_complete

nci_close_device() and nci_rx_work can both call nci_data_exchange_complete() concurrently. After commit 4527025d440ce8 ("nfc: nci: fix circular locking dependency in nci_close_device") moved flush_workqueue(ndev->rx_wq) after mutex_unlock(&ndev->req_lock), rx_work is no longer serialized with the explicit completion call in the close path. Both callers read the non-NULL callback pointer and invoke rawsock_data_exchange_complete(), which calls sock_put() – but only one sock_hold() was taken, so the second sock_put() underflows the refcount and frees the socket while it is still in use.

Replace the bare clear_bit(NCI_DATA_EXCHANGE) with test_and_clear_bit() so that only the first caller proceeds to invoke the callback.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7ed00a3edc8597fe2333f524401e2889aa1b5edf < 3f075832734005310740d148d1cf1c1e792ebdcaaffected
LinuxLinux5eef9ebec7f5738f12cadede3545c05b34bf5ac3 < 588ccd19a6e69eca72d54608c3ab3b45709b2305affected
LinuxLinuxca54e904a071aa65ef3ad46ba42d51aaac6b73b4 < cf646a9f5554bc07d6ccb59c327812b3a0c6a368affected
LinuxLinuxeb435d150ca74b4d40f77f1a2266f3636ed64a79 < 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2affected
LinuxLinux1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 < bfdf412208fea7fc0d5b32d68a35b25261917393affected
LinuxLinuxd89b74bf08f067b55c03d7f999ba0a0e73177eb3 < ba4c776af3dc21ed04e315e6545e99703bb1b53aaffected
LinuxLinux4527025d440ce84bf56e75ce1df2e84cb8178616 < ee08414d78b851e3d1856d6e4d631939b01a1bbeaffected
LinuxLinux4527025d440ce84bf56e75ce1df2e84cb8178616 < 8265a626cc14a48e46e6dc8c47667e72b4232ac2affected
LinuxLinux09143c0e8f3b03517e6233aad42f45c794d8df8eaffected
LinuxLinux5.10.253 < 5.10.270affected
LinuxLinux5.15.203 < 5.15.221affected
LinuxLinux6.1.168 < 6.1.188affected
LinuxLinux6.6.131 < 6.6.157affected
LinuxLinux6.12.80 < 6.12.110affected
LinuxLinux6.18.21 < 6.18.52affected
LinuxLinux6.19.11 < 6.20affected
LinuxLinux7.0affected
LinuxLinux0 < 7.0unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References