CVE-2026-90224
Description
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.
How to fix
- Linux Linux3f075832734005310740d148d1cf1c1e792ebdca, 588ccd19a6e69eca72d54608c3ab3b45709b2305, cf646a9f5554bc07d6ccb59c327812b3a0c6a368, 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2, bfdf412208fea7fc0d5b32d68a35b25261917393, ba4c776af3dc21ed04e315e6545e99703bb1b53a, ee08414d78b851e3d1856d6e4d631939b01a1bbe, 8265a626cc14a48e46e6dc8c47667e72b4232ac2, 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 6.20 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7ed00a3edc8597fe2333f524401e2889aa1b5edf ≤ v < 3f075832734005310740d148d1cf1c1e792ebdca, 5eef9ebec7f5738f12cadede3545c05b34bf5ac3 ≤ v < 588ccd19a6e69eca72d54608c3ab3b45709b2305, ca54e904a071aa65ef3ad46ba42d51aaac6b73b4 ≤ v < cf646a9f5554bc07d6ccb59c327812b3a0c6a368, eb435d150ca74b4d40f77f1a2266f3636ed64a79 ≤ v < 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2, 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 ≤ v < bfdf412208fea7fc0d5b32d68a35b25261917393, d89b74bf08f067b55c03d7f999ba0a0e73177eb3 ≤ v < ba4c776af3dc21ed04e315e6545e99703bb1b53a, 4527025d440ce84bf56e75ce1df2e84cb8178616 ≤ v < ee08414d78b851e3d1856d6e4d631939b01a1bbe, 4527025d440ce84bf56e75ce1df2e84cb8178616 ≤ v < 8265a626cc14a48e46e6dc8c47667e72b4232ac2, 09143c0e8f3b03517e6233aad42f45c794d8df8e, 5.10.253 ≤ v < 5.10.270, 5.15.203 ≤ v < 5.15.221, 6.1.168 ≤ v < 6.1.188, 6.6.131 ≤ v < 6.6.157, 6.12.80 ≤ v < 6.12.110, 6.18.21 ≤ v < 6.18.52, 6.19.11 ≤ v < 6.20, 7.0 | 3f075832734005310740d148d1cf1c1e792ebdca, 588ccd19a6e69eca72d54608c3ab3b45709b2305, cf646a9f5554bc07d6ccb59c327812b3a0c6a368, 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2, bfdf412208fea7fc0d5b32d68a35b25261917393, ba4c776af3dc21ed04e315e6545e99703bb1b53a, ee08414d78b851e3d1856d6e4d631939b01a1bbe, 8265a626cc14a48e46e6dc8c47667e72b4232ac2, 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 6.20 |
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