CVE-2026-31509

nfc: nci: fix circular locking dependency in nci_close_device

State: Published
Severity: Not scored
Published: Apr 22, 2026
Updated: May 11, 2026
Reserved: Mar 9, 2026

Description

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

nfc: nci: fix circular locking dependency in nci_close_device

nci_close_device() flushes rx_wq and tx_wq while holding req_lock. This causes a circular locking dependency because nci_rx_work() running on rx_wq can end up taking req_lock too:

nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock)

Move the flush of rx_wq after req_lock has been released. This should safe (I think) because NCI_UP has already been cleared and the transport is closed, so the work will see it and return -ENETDOWN.

NIPA has been hitting this running the nci selftest with a debug kernel on roughly 4% of the runs.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 7ed00a3edc8597fe2333f524401e2889aa1b5edfAffected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 5eef9ebec7f5738f12cadede3545c05b34bf5ac3Affected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before ca54e904a071aa65ef3ad46ba42d51aaac6b73b4Affected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before eb435d150ca74b4d40f77f1a2266f3636ed64a79Affected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289Affected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before d89b74bf08f067b55c03d7f999ba0a0e73177eb3Affected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 09143c0e8f3b03517e6233aad42f45c794d8df8eAffected 6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 4527025d440ce84bf56e75ce1df2e84cb8178616Affected
LinuxLinux	3.2Affected before 3.2Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.168 through 6.1.Not affected 6.6.131 through 6.6.Not affected 6.12.80 through 6.12.Not affected 6.18.21 through 6.18.Not affected 6.19.11 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 7ed00a3edc8597fe2333f524401e2889aa1b5edfAffected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 5eef9ebec7f5738f12cadede3545c05b34bf5ac3Affected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before ca54e904a071aa65ef3ad46ba42d51aaac6b73b4Affected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before eb435d150ca74b4d40f77f1a2266f3636ed64a79Affected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289Affected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before d89b74bf08f067b55c03d7f999ba0a0e73177eb3Affected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 09143c0e8f3b03517e6233aad42f45c794d8df8eAffected
6a2968aaf50c7a22fced77a5e24aa636281efca8 to before 4527025d440ce84bf56e75ce1df2e84cb8178616Affected

LinuxLinux

3.2Affected
before 3.2Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.168 through 6.1.*Not affected
6.6.131 through 6.6.*Not affected
6.12.80 through 6.12.*Not affected
6.18.21 through 6.18.*Not affected
6.19.11 through 6.19.*Not affected
7.0 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.