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.
Metrics
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7ed00a3edc8597fe2333f524401e2889aa1b5edf, < 3f075832734005310740d148d1cf1c1e792ebdca; >= 5eef9ebec7f5738f12cadede3545c05b34bf5ac3, < 588ccd19a6e69eca72d54608c3ab3b45709b2305; >= ca54e904a071aa65ef3ad46ba42d51aaac6b73b4, < cf646a9f5554bc07d6ccb59c327812b3a0c6a368; >= eb435d150ca74b4d40f77f1a2266f3636ed64a79, < 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2; >= 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289, < bfdf412208fea7fc0d5b32d68a35b25261917393; >= d89b74bf08f067b55c03d7f999ba0a0e73177eb3, < ba4c776af3dc21ed04e315e6545e99703bb1b53a; >= 4527025d440ce84bf56e75ce1df2e84cb8178616, < ee08414d78b851e3d1856d6e4d631939b01a1bbe; >= 4527025d440ce84bf56e75ce1df2e84cb8178616, < 8265a626cc14a48e46e6dc8c47667e72b4232ac2; 09143c0e8f3b03517e6233aad42f45c794d8df8e; >= 5.10.253, < 5.10.270; >= 5.15.203, < 5.15.221; >= 6.1.168, < 6.1.188; >= 6.6.131, < 6.6.157; >= 6.12.80, < 6.12.110; >= 6.18.21, < 6.18.52; >= 6.19.11, < 6.20 |
| Linux | Linux | 7.0 |
References
- https://git.kernel.org/stable/c/3f075832734005310740d148d1cf1c1e792ebdca
- https://git.kernel.org/stable/c/588ccd19a6e69eca72d54608c3ab3b45709b2305
- https://git.kernel.org/stable/c/8265a626cc14a48e46e6dc8c47667e72b4232ac2
- https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e54cef462d159b5248f09fd2
- https://git.kernel.org/stable/c/ba4c776af3dc21ed04e315e6545e99703bb1b53a
- https://git.kernel.org/stable/c/bfdf412208fea7fc0d5b32d68a35b25261917393
- https://git.kernel.org/stable/c/cf646a9f5554bc07d6ccb59c327812b3a0c6a368
- https://git.kernel.org/stable/c/ee08414d78b851e3d1856d6e4d631939b01a1bbe
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received