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CVE-2026-98297— Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已修复： 蓝牙：hci_core：修复在 workqueue 排空后对 tx_work 的排队操作 、 和 无条件地将 加入队列。这些函数可能在 L2CAP/SCO/ISO 套接字发送路径中运行，而此时 正在排空 （即 HCIDEVDOWN 状态与套接字写入操作发生竞争）。由于 不是来自 工作本身的链式工作， 会检测到队列标记为 ，并发出警告“cannot queue %ps on wq %s”（无法将 %ps 入队到工作队列 %s 上），随后丢弃该工作项，导致如下警告： 在排空之前

AI Predicted 5.5 Difficulty: Easy EPSS 0.18% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 9cebe4680bb9a72f80c6541eb24af06db7a1fbc9< ab0678a0701ac4de499428dc1b321659bb74d272 affected
47330cc875b36a1cf7b3543cb2cf90a7c603ce0e< e220c1242a643d97102a79f09b7ef3aa31276961 affected
525daaea459fc215f432de1b8debbd9144bf97b0< cbb325bc150e8c0dbce004ac0e5516bcffc0de31 affected
525daaea459fc215f432de1b8debbd9144bf97b0< 6610c6fe4b8936c232048e6049bf77c70a6f759c affected
60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff affected
6.12.93< 6.12.112 affected
6.18.35< 6.18.54 affected
7.0.12< 7.1 affected
… +6 more rows
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I. Basic Information for CVE-2026-98297

Vulnerability Information
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Vulnerability Title
Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9cebe4680bb9a72f80c6541eb24af06db7a1fbc9 ~ ab0678a0701ac4de499428dc1b321659bb74d272 -
Linux Linux 7.1 -

II. Public POCs for CVE-2026-98297

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III. Intelligence Information for CVE-2026-98297

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Patches & Fixes for CVE-2026-98297 (4)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98305 7.8 HIGH net: dsa: mxl862xx: disable the stats poll on teardown
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98297

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