316 lines
17 KiB
JSON
316 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90224",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.794Z",
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"datePublished": "2026-09-17T16:07:34.009Z",
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"dateUpdated": "2026-10-19T09:00:00.751Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:00:00.751Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/nfc/nci/data.c"
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],
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"versions": [
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{
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"version": "7ed00a3edc8597fe2333f524401e2889aa1b5edf",
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"lessThan": "3f075832734005310740d148d1cf1c1e792ebdca",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5eef9ebec7f5738f12cadede3545c05b34bf5ac3",
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"lessThan": "588ccd19a6e69eca72d54608c3ab3b45709b2305",
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"status": "affected",
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},
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"version": "ca54e904a071aa65ef3ad46ba42d51aaac6b73b4",
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"lessThan": "cf646a9f5554bc07d6ccb59c327812b3a0c6a368",
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},
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"version": "eb435d150ca74b4d40f77f1a2266f3636ed64a79",
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"lessThan": "9030a1bbe2c6b1e3e54cef462d159b5248f09fd2",
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"status": "affected",
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},
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"version": "1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289",
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"lessThan": "bfdf412208fea7fc0d5b32d68a35b25261917393",
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"status": "affected",
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},
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{
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"version": "09143c0e8f3b03517e6233aad42f45c794d8df8e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.10.253",
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"lessThan": "5.10.270",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.203",
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"lessThan": "5.15.221",
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"status": "affected",
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},
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{
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"version": "6.1.168",
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"lessThan": "6.1.188",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.131",
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"lessThan": "6.6.157",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.80",
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"lessThan": "6.12.110",
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"status": "affected",
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},
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{
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"version": "6.18.21",
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"lessThan": "6.18.52",
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"status": "affected",
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},
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{
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"version": "6.19.11",
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"lessThan": "6.20",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/nfc/nci/data.c"
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],
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"version": "0",
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"status": "unaffected",
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"lessThanOrEqual": "5.15.*",
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},
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"lessThanOrEqual": "6.1.*",
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},
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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},
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/3f075832734005310740d148d1cf1c1e792ebdca"
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},
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{
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"url": "https://git.kernel.org/stable/c/588ccd19a6e69eca72d54608c3ab3b45709b2305"
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},
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{
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"url": "https://git.kernel.org/stable/c/cf646a9f5554bc07d6ccb59c327812b3a0c6a368"
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},
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{
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"url": "https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e54cef462d159b5248f09fd2"
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},
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{
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"url": "https://git.kernel.org/stable/c/bfdf412208fea7fc0d5b32d68a35b25261917393"
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},
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{
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"url": "https://git.kernel.org/stable/c/ba4c776af3dc21ed04e315e6545e99703bb1b53a"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee08414d78b851e3d1856d6e4d631939b01a1bbe"
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},
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{
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"url": "https://git.kernel.org/stable/c/8265a626cc14a48e46e6dc8c47667e72b4232ac2"
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}
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],
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"title": "nfc: nci: fix double completion race in nci_data_exchange_complete",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |