{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31509","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.106Z","datePublished":"2026-04-22T13:54:27.436Z","dateUpdated":"2026-05-11T22:10:10.109Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:10:10.109Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix circular locking dependency in nci_close_device\n\nnci_close_device() flushes rx_wq and tx_wq while holding req_lock.\nThis causes a circular locking dependency because nci_rx_work()\nrunning on rx_wq can end up taking req_lock too:\n\n  nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete\n    -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target\n    -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock)\n\nMove the flush of rx_wq after req_lock has been released.\nThis should safe (I think) because NCI_UP has already been cleared\nand the transport is closed, so the work will see it and return\n-ENETDOWN.\n\nNIPA has been hitting this running the nci selftest with a debug\nkernel on roughly 4% of the runs."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/core.c"],"versions":[{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"7ed00a3edc8597fe2333f524401e2889aa1b5edf","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"5eef9ebec7f5738f12cadede3545c05b34bf5ac3","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"ca54e904a071aa65ef3ad46ba42d51aaac6b73b4","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"eb435d150ca74b4d40f77f1a2266f3636ed64a79","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"d89b74bf08f067b55c03d7f999ba0a0e73177eb3","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"09143c0e8f3b03517e6233aad42f45c794d8df8e","status":"affected","versionType":"git"},{"version":"6a2968aaf50c7a22fced77a5e24aa636281efca8","lessThan":"4527025d440ce84bf56e75ce1df2e84cb8178616","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/nci/core.c"],"versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.131","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.80","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.21","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.11","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.19.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7ed00a3edc8597fe2333f524401e2889aa1b5edf"},{"url":"https://git.kernel.org/stable/c/5eef9ebec7f5738f12cadede3545c05b34bf5ac3"},{"url":"https://git.kernel.org/stable/c/ca54e904a071aa65ef3ad46ba42d51aaac6b73b4"},{"url":"https://git.kernel.org/stable/c/eb435d150ca74b4d40f77f1a2266f3636ed64a79"},{"url":"https://git.kernel.org/stable/c/1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289"},{"url":"https://git.kernel.org/stable/c/d89b74bf08f067b55c03d7f999ba0a0e73177eb3"},{"url":"https://git.kernel.org/stable/c/09143c0e8f3b03517e6233aad42f45c794d8df8e"},{"url":"https://git.kernel.org/stable/c/4527025d440ce84bf56e75ce1df2e84cb8178616"}],"title":"nfc: nci: fix circular locking dependency in nci_close_device","x_generator":{"engine":"bippy-1.2.0"}}}}