CVE-2026-98297 (GCVE-0-2026-98297)
Vulnerability from cvelistv5
Published
2026-10-06 08:45
Modified
2026-10-21 12:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained hci_send_acl(), hci_send_sco() and hci_send_iso() queue hdev->tx_work unconditionally. They can run from the L2CAP/SCO/ISO socket send path while hci_dev_close_sync() is draining hdev->workqueue (HCIDEVDOWN racing with a socket write). Since that queue_work() is not chained work from the tx_work worker itself, __queue_work() sees the queue marked __WQ_DRAINING, warns "cannot queue %ps on wq %s", and drops the work: WARNING: CPU: 1 PID: 5985 at kernel/workqueue.c:2352 __queue_work Call Trace: queue_work_on l2cap_chan_send l2cap_sock_sendmsg ... hci_dev_close_sync() already sets HCI_CMD_DRAIN_WORKQUEUE before draining, but only hci_cmd_work() and handle_cmd_cnt_and_timer() check it before queuing. Route the tx_work producers through the same guard via a shared hci_sched_tx() helper.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7b81c1378b79c3143ca3fdb3d18ac0f01cbabb21
Version: 9cebe4680bb9a72f80c6541eb24af06db7a1fbc9
Version: 47330cc875b36a1cf7b3543cb2cf90a7c603ce0e
Version: 525daaea459fc215f432de1b8debbd9144bf97b0
Version: 525daaea459fc215f432de1b8debbd9144bf97b0
Version: 60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff
Version: 6.12.93   ≤
Version: 6.18.35   ≤
Version: 7.0.12   ≤
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{
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          "defaultStatus": "unaffected",
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          "programFiles": [
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Fix queuing tx_work after workqueue is drained\n\nhci_send_acl(), hci_send_sco() and hci_send_iso() queue hdev-\u003etx_work\nunconditionally. They can run from the L2CAP/SCO/ISO socket send path\nwhile hci_dev_close_sync() is draining hdev-\u003eworkqueue (HCIDEVDOWN\nracing with a socket write). Since that queue_work() is not chained\nwork from the tx_work worker itself, __queue_work() sees the queue\nmarked __WQ_DRAINING, warns \"cannot queue %ps on wq %s\", and drops\nthe work:\n\n  WARNING: CPU: 1 PID: 5985 at kernel/workqueue.c:2352 __queue_work\n  Call Trace:\n   queue_work_on\n   l2cap_chan_send\n   l2cap_sock_sendmsg\n   ...\n\nhci_dev_close_sync() already sets HCI_CMD_DRAIN_WORKQUEUE before\ndraining, but only hci_cmd_work() and handle_cmd_cnt_and_timer()\ncheck it before queuing. Route the tx_work producers through the\nsame guard via a shared hci_sched_tx() helper."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:54:55.978Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8010212197d4a3ee714f78ed77048d0b712ff925"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272"
        },
        {
          "url": "https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31"
        },
        {
          "url": "https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c"
        }
      ],
      "title": "Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98297",
    "datePublished": "2026-10-06T08:45:55.723Z",
    "dateReserved": "2026-09-25T10:25:14.337Z",
    "dateUpdated": "2026-10-21T12:54:55.978Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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