GHSA-MVFP-XJR6-RMVQ
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98297"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:20Z",
"severity": null
},
"details": "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.",
"id": "GHSA-mvfp-xjr6-rmvq",
"modified": "2026-10-06T09:31:33Z",
"published": "2026-10-06T09:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98297"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961"
}
],
"schema_version": "1.4.0",
"severity": []
}
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