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EUVD-2026-372098

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:39

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T08:39:00.991194+00:00",
  "id": "EUVD-2026-372098"
}

CVE-2026-90224 (GCVE-0-2026-90224)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-09-18 17:53

Title

nfc: nci: fix double completion race in nci_data_exchange_complete

Summary

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix double completion race in nci_data_exchange_complete nci_close_device() and nci_rx_work can both call nci_data_exchange_complete() concurrently. After commit 4527025d440ce8 ("nfc: nci: fix circular locking dependency in nci_close_device") moved flush_workqueue(ndev->rx_wq) after mutex_unlock(&ndev->req_lock), rx_work is no longer serialized with the explicit completion call in the close path. Both callers read the non-NULL callback pointer and invoke rawsock_data_exchange_complete(), which calls sock_put() -- but only one sock_hold() was taken, so the second sock_put() underflows the refcount and frees the socket while it is still in use. Replace the bare clear_bit(NCI_DATA_EXCHANGE) with test_and_clear_bit() so that only the first caller proceeds to invoke the callback.

Severity

7.5 (High)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/3f075832734005310…
https://git.kernel.org/stable/c/588ccd19a6e69eca7…
https://git.kernel.org/stable/c/cf646a9f5554bc07d…
https://git.kernel.org/stable/c/9030a1bbe2c6b1e3e…
https://git.kernel.org/stable/c/bfdf412208fea7fc0…
https://git.kernel.org/stable/c/ba4c776af3dc21ed0…
https://git.kernel.org/stable/c/ee08414d78b851e3d…
https://git.kernel.org/stable/c/8265a626cc14a48e4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7ed00a3edc8597fe2333f524401e2889aa1b5edf , < 3f075832734005310740d148d1cf1c1e792ebdca (git) Affected: 5eef9ebec7f5738f12cadede3545c05b34bf5ac3 , < 588ccd19a6e69eca72d54608c3ab3b45709b2305 (git) Affected: ca54e904a071aa65ef3ad46ba42d51aaac6b73b4 , < cf646a9f5554bc07d6ccb59c327812b3a0c6a368 (git) Affected: eb435d150ca74b4d40f77f1a2266f3636ed64a79 , < 9030a1bbe2c6b1e3e54cef462d159b5248f09fd2 (git) Affected: 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289 , < bfdf412208fea7fc0d5b32d68a35b25261917393 (git) Affected: d89b74bf08f067b55c03d7f999ba0a0e73177eb3 , < ba4c776af3dc21ed04e315e6545e99703bb1b53a (git) Affected: 4527025d440ce84bf56e75ce1df2e84cb8178616 , < ee08414d78b851e3d1856d6e4d631939b01a1bbe (git) Affected: 4527025d440ce84bf56e75ce1df2e84cb8178616 , < 8265a626cc14a48e46e6dc8c47667e72b4232ac2 (git) Affected: 09143c0e8f3b03517e6233aad42f45c794d8df8e (git) Affected: 5.10.253 , < 5.10.270 (semver) Affected: 5.15.203 , < 5.15.221 (semver) Affected: 6.1.168 , < 6.1.188 (semver) Affected: 6.6.131 , < 6.6.157 (semver) Affected: 6.12.80 , < 6.12.110 (semver) Affected: 6.18.21 , < 6.18.52 (semver) Affected: 6.19.11 , < 6.20 (semver)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/data.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3f075832734005310740d148d1cf1c1e792ebdca",
              "status": "affected",
              "version": "7ed00a3edc8597fe2333f524401e2889aa1b5edf",
              "versionType": "git"
            },
            {
              "lessThan": "588ccd19a6e69eca72d54608c3ab3b45709b2305",
              "status": "affected",
              "version": "5eef9ebec7f5738f12cadede3545c05b34bf5ac3",
              "versionType": "git"
            },
            {
              "lessThan": "cf646a9f5554bc07d6ccb59c327812b3a0c6a368",
              "status": "affected",
              "version": "ca54e904a071aa65ef3ad46ba42d51aaac6b73b4",
              "versionType": "git"
            },
            {
              "lessThan": "9030a1bbe2c6b1e3e54cef462d159b5248f09fd2",
              "status": "affected",
              "version": "eb435d150ca74b4d40f77f1a2266f3636ed64a79",
              "versionType": "git"
            },
            {
              "lessThan": "bfdf412208fea7fc0d5b32d68a35b25261917393",
              "status": "affected",
              "version": "1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289",
              "versionType": "git"
            },
            {
              "lessThan": "ba4c776af3dc21ed04e315e6545e99703bb1b53a",
              "status": "affected",
              "version": "d89b74bf08f067b55c03d7f999ba0a0e73177eb3",
              "versionType": "git"
            },
            {
              "lessThan": "ee08414d78b851e3d1856d6e4d631939b01a1bbe",
              "status": "affected",
              "version": "4527025d440ce84bf56e75ce1df2e84cb8178616",
              "versionType": "git"
            },
            {
              "lessThan": "8265a626cc14a48e46e6dc8c47667e72b4232ac2",
              "status": "affected",
              "version": "4527025d440ce84bf56e75ce1df2e84cb8178616",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "09143c0e8f3b03517e6233aad42f45c794d8df8e",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.157",
              "status": "affected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.110",
              "status": "affected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.52",
              "status": "affected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThan": "6.20",
              "status": "affected",
              "version": "6.19.11",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/nci/data.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "5.10.253",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.15.203",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "6.1.168",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "6.6.131",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.12.80",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.18.21",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.19.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003erx_wq) after mutex_unlock(\u0026ndev-\u003ereq_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": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - One completion is nci_rx_work() handling an NCI_MT_DATA_PKT (nci_rx_data_packet()\u2192nci_add_rx_data_frag()\u2192nci_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-\u003erx_wq) moved past mutex_unlock(\u0026ndev-\u003ereq_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()\u2192nci_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\u0027s 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-\u003edata_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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T17:53:51.131Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90224",
    "datePublished": "2026-09-17T16:07:34.009Z",
    "dateReserved": "2026-09-11T19:38:34.794Z",
    "dateUpdated": "2026-09-18T17:53:51.131Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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EUVD-2026-372098

CVE-2026-90224 (GCVE-0-2026-90224)

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