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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-90224

nfc: nci: fix double completion race in nci_data_exchange_complete

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7ed00a3edc8597fe2333f524401e2889aa1b5edf to < 3f075832734005310740d148d1cf1c1e792ebdcaaffected
  • 5eef9ebec7f5738f12cadede3545c05b34bf5ac3 to < 588ccd19a6e69eca72d54608c3ab3b45709b2305affected
  • ca54e904a071aa65ef3ad46ba42d51aaac6b73b4 to < cf646a9f5554bc07d6ccb59c327812b3a0c6a368affected
  • eb435d150ca74b4d40f77f1a2266f3636ed64a79 to < 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2affected
  • 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 to < bfdf412208fea7fc0d5b32d68a35b25261917393affected
  • d89b74bf08f067b55c03d7f999ba0a0e73177eb3 to < ba4c776af3dc21ed04e315e6545e99703bb1b53aaffected
  • 4527025d440ce84bf56e75ce1df2e84cb8178616 to < ee08414d78b851e3d1856d6e4d631939b01a1bbeaffected
  • 4527025d440ce84bf56e75ce1df2e84cb8178616 to < 8265a626cc14a48e46e6dc8c47667e72b4232ac2affected
  • 09143c0e8f3b03517e6233aad42f45c794d8df8eaffected
  • 5.10.253 to < 5.10.270affected
  • 5.15.203 to < 5.15.221affected
  • 6.1.168 to < 6.1.188affected
  • 6.6.131 to < 6.6.157affected
  • 6.12.80 to < 6.12.110affected
  • 6.18.21 to < 6.18.52affected
  • 6.19.11 to < 6.20affected

Linux Linux

Default version status: affected

  • 7.0affected
  • 0 to < 7.0unaffected
  • 5.10.270 to ≤ 5.10.*unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.110 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References