{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90224", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.794Z", "datePublished": "2026-09-17T16:07:34.009Z", "dateUpdated": "2026-10-19T09:00:00.751Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:00:00.751Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix double completion race in nci_data_exchange_complete\n\nnci_close_device() and nci_rx_work can both call\nnci_data_exchange_complete() concurrently. After commit 4527025d440ce8\n(\"nfc: nci: fix circular locking dependency in nci_close_device\") moved\nflush_workqueue(ndev->rx_wq) after mutex_unlock(&ndev->req_lock),\nrx_work is no longer serialized with the explicit completion call in the\nclose path. Both callers read the non-NULL callback pointer and invoke\nrawsock_data_exchange_complete(), which calls sock_put() -- but only one\nsock_hold() was taken, so the second sock_put() underflows the refcount\nand frees the socket while it is still in use.\n\nReplace the bare clear_bit(NCI_DATA_EXCHANGE) with\ntest_and_clear_bit() so that only the first caller proceeds to invoke\nthe callback." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - One completion is nci_rx_work() handling an NCI_MT_DATA_PKT (nci_rx_data_packet()→nci_add_rx_data_frag()→nci_data_exchange_complete()), with that skb queued by nci_recv_frame() from the NFC controller as NFC RF traffic; NFC radio range is Adjacent, not a routable IP transport.\nAC:H - The bug is nci_close_device() and nci_rx_work() both invoking nci_data_exchange_complete() after flush_workqueue(ndev->rx_wq) moved past mutex_unlock(&ndev->req_lock). An NFC peer can drive rx_work but cannot start that close: nfc_dev_down() returns -EBUSY while active_target is set, and nci_unregister_device() is driver teardown the peer cannot initiate.\nPR:N - nci_recv_frame()→nci_rx_work() processes NCI frames with no capability or authentication check, so an in-range NFC peer needs no host account. GENL_ADMIN_PERM on nfc_genl_dev_down()/NFC_CMD_DEV_DOWN is only the victim-side close gate, not a privilege the adjacent attacker must hold.\nUI:N - With NFC already up and nci_transceive() having set NCI_DATA_EXCHANGE (normal for a polling reader or in-progress tag session), the peer's DATA packet completes via nci_rx_work with no further click, mount, or prompt; concurrent nci_close_device() is an AC condition, not a required victim action.\nS:U - The extra sock_put() in rawsock_data_exchange_complete() frees a host kernel struct sock; impact stays in the same kernel authority with no VM escape, IOMMU bypass, or sandbox crossing.\nC:H - nci_close_device() and nci_rx_work() both read conn_info->data_exchange_cb and call rawsock_data_exchange_complete(), which sock_put()s the sk held once by sock_hold() in rawsock_tx_work(); the second put underflows that refcount and frees the socket while still referenced, a UAF read primitive.\nI:H - The same double sock_put() of the PF_NFC SOCK_SEQPACKET socket is a kernel UAF on struct sock, and the second callback runs against that freed object, giving a heap write/control-flow hijack primitive.\nA:H - Refcount underflow and the second rawsock_data_exchange_complete() on the already-freed sk (or __sk_destruct racing the second put, the path that also hit nci_close_device lockdep) cause a kernel oops or panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/nfc/nci/data.c" ], "versions": [ { "version": "7ed00a3edc8597fe2333f524401e2889aa1b5edf", "lessThan": "3f075832734005310740d148d1cf1c1e792ebdca", "status": "affected", "versionType": "git" }, { "version": "5eef9ebec7f5738f12cadede3545c05b34bf5ac3", "lessThan": "588ccd19a6e69eca72d54608c3ab3b45709b2305", "status": "affected", "versionType": "git" }, { "version": "ca54e904a071aa65ef3ad46ba42d51aaac6b73b4", "lessThan": "cf646a9f5554bc07d6ccb59c327812b3a0c6a368", "status": "affected", "versionType": "git" }, { "version": "eb435d150ca74b4d40f77f1a2266f3636ed64a79", "lessThan": "9030a1bbe2c6b1e3e54cef462d159b5248f09fd2", "status": "affected", "versionType": "git" }, { "version": "1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289", "lessThan": "bfdf412208fea7fc0d5b32d68a35b25261917393", "status": "affected", "versionType": "git" }, { "version": "d89b74bf08f067b55c03d7f999ba0a0e73177eb3", "lessThan": "ba4c776af3dc21ed04e315e6545e99703bb1b53a", "status": "affected", "versionType": "git" }, { "version": "4527025d440ce84bf56e75ce1df2e84cb8178616", "lessThan": "ee08414d78b851e3d1856d6e4d631939b01a1bbe", "status": "affected", "versionType": "git" }, { "version": "4527025d440ce84bf56e75ce1df2e84cb8178616", "lessThan": "8265a626cc14a48e46e6dc8c47667e72b4232ac2", "status": "affected", "versionType": "git" }, { "version": "09143c0e8f3b03517e6233aad42f45c794d8df8e", "status": "affected", "versionType": "git" }, { "version": "5.10.253", "lessThan": "5.10.270", "status": "affected", "versionType": "semver" }, { "version": "5.15.203", "lessThan": "5.15.221", "status": "affected", "versionType": "semver" }, { "version": "6.1.168", "lessThan": "6.1.188", "status": "affected", "versionType": "semver" }, { "version": "6.6.131", "lessThan": "6.6.157", "status": "affected", "versionType": "semver" }, { "version": "6.12.80", "lessThan": "6.12.110", "status": "affected", "versionType": "semver" }, { "version": "6.18.21", "lessThan": "6.18.52", "status": "affected", "versionType": "semver" }, { "version": "6.19.11", "lessThan": "6.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/nfc/nci/data.c" ], "versions": [ { "version": "7.0", "status": "affected" }, { "version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "5.10.253", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.203", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.168", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.131", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.80", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.21", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3f075832734005310740d148d1cf1c1e792ebdca" }, { "url": "https://git.kernel.org/stable/c/588ccd19a6e69eca72d54608c3ab3b45709b2305" }, { "url": "https://git.kernel.org/stable/c/cf646a9f5554bc07d6ccb59c327812b3a0c6a368" }, { "url": "https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e54cef462d159b5248f09fd2" }, { "url": "https://git.kernel.org/stable/c/bfdf412208fea7fc0d5b32d68a35b25261917393" }, { "url": "https://git.kernel.org/stable/c/ba4c776af3dc21ed04e315e6545e99703bb1b53a" }, { "url": "https://git.kernel.org/stable/c/ee08414d78b851e3d1856d6e4d631939b01a1bbe" }, { "url": "https://git.kernel.org/stable/c/8265a626cc14a48e46e6dc8c47667e72b4232ac2" } ], "title": "nfc: nci: fix double completion race in nci_data_exchange_complete", "x_generator": { "engine": "bippy-1.2.0" } } } }