CVE-2026-31509

medium

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix circular locking dependency in nci_close_device nci_close_device() flushes…

Vendor / product: Linux — linux kernel

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.

CVSS

5.5

5.5 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-04-22 14:16

Modified: 2026-11-11 23:10

NVD status: Analyzed

Last synced 3 hours ago

Verified against the source API 2026-11-11 23:12 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥3.2.1 <5.10.253, ≥5.11 <5.15.203, ≥5.16 <6.1.168, ≥6.2 <6.6.131, ≥6.7 <6.12.80, ≥6.13 <6.18.21

Weakness classification (CWE)

CWE-667

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/09143c0e8f3b03517e6233aad42f45c794d8df8e

Patch / mitigation: https://git.kernel.org/stable/c/1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289

Patch / mitigation: https://git.kernel.org/stable/c/4527025d440ce84bf56e75ce1df2e84cb8178616

Patch / mitigation: https://git.kernel.org/stable/c/5eef9ebec7f5738f12cadede3545c05b34bf5ac3

Patch / mitigation: https://git.kernel.org/stable/c/7ed00a3edc8597fe2333f524401e2889aa1b5edf

Patch / mitigation: https://git.kernel.org/stable/c/ca54e904a071aa65ef3ad46ba42d51aaac6b73b4

Patch / mitigation: https://git.kernel.org/stable/c/d89b74bf08f067b55c03d7f999ba0a0e73177eb3

Patch / mitigation: https://git.kernel.org/stable/c/eb435d150ca74b4d40f77f1a2266f3636ed64a79

References

https://git.kernel.org/stable/c/09143c0e8f3b03517e6233aad42f45c794d8df8e 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4527025d440ce84bf56e75ce1df2e84cb8178616 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5eef9ebec7f5738f12cadede3545c05b34bf5ac3 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7ed00a3edc8597fe2333f524401e2889aa1b5edf 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ca54e904a071aa65ef3ad46ba42d51aaac6b73b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d89b74bf08f067b55c03d7f999ba0a0e73177eb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/eb435d150ca74b4d40f77f1a2266f3636ed64a79 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 23:12 UTC · record ↗

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CVE-2026-31509

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Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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