CVE-2026-90224nfc: nci: fix double completion race in nci_data_exchange_complete
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 7ed00a3edc8597fe2333f524401e2889aa1b5edf builds before 3f075832734005310740d148d1cf1c1e792ebdca; from 5eef9ebec7f5738f12cadede3545c05b34bf5ac3 before 588ccd19a6e69eca72d54608c3ab3b45709b2305; from ca54e904a071aa65ef3ad46ba42d51aaac6b73b4 before cf646a9f5554bc07d6ccb59c327812b3a0c6a368; from eb435d150ca74b4d40f77f1a2266f3636ed64a79 before 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2; from 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 before bfdf412208fea7fc0d5b32d68a35b25261917393; from d89b74bf08f067b55c03d7f999ba0a0e73177eb3 before ba4c776af3dc21ed04e315e6545e99703bb1b53a; from 4527025d440ce84bf56e75ce1df2e84cb8178616 before ee08414d78b851e3d1856d6e4d631939b01a1bbe; 4527025d440ce84bf56e75ce1df2e84cb8178616 builds before 8265a626cc14a48e46e6dc8c47667e72b4232ac2; and 8 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/3f075832734005310740d148d1cf1c1e792ebdca
- https://git.kernel.org/stable/c/588ccd19a6e69eca72d54608c3ab3b45709b2305
- https://git.kernel.org/stable/c/cf646a9f5554bc07d6ccb59c327812b3a0c6a368
- https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e54cef462d159b5248f09fd2
- https://git.kernel.org/stable/c/bfdf412208fea7fc0d5b32d68a35b25261917393
- https://git.kernel.org/stable/c/ba4c776af3dc21ed04e315e6545e99703bb1b53a
- https://git.kernel.org/stable/c/ee08414d78b851e3d1856d6e4d631939b01a1bbe
- https://git.kernel.org/stable/c/8265a626cc14a48e46e6dc8c47667e72b4232ac2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.