CVE-2026-98297Public exploitHinoki check available

Bluetooth packet loss via transmit-work drain race

Published Oct 6, 2026 · Updated Oct 6, 2026

A Bluetooth transmit-work race in Linux kernel 6.18.35 through 6.18.53 lets local users interrupt packet transmission during device shutdown. The hci_send_acl(), hci_send_sco(), and hci_send_iso() paths queue tx_work without checking whether hci_dev_close_sync() is draining its workqueue, so the kernel warns and drops the work. The demonstrated trigger races a Bluetooth socket write with HCIDEVDOWN, which requires CAP_NET_ADMIN; the documented consequence is dropped transmit work, not arbitrary code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A Bluetooth transmit-work race in Linux kernel 6.18.35 through 6.18.53 lets local users interrupt packet transmission during device shutdown. The hci_send_acl(), hci_send_sco(), and hci_send_iso() paths queue tx_work without checking whether hci_dev_close_sync() is draining its workqueue, so the kernel warns and drops the work. The demonstrated trigger races a Bluetooth socket write with HCIDEVDOWN, which requires CAP_NET_ADMIN; the documented consequence is dropped transmit work, not arbitrary code execution.

The record

CVE
CVE-2026-98297
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=47330cc875b36a1cf7b3543cb2cf90a7c603ce0e <e220c1242a643d97102a79f09b7ef3aa31276961
  2. Affected versionversion=525daaea459fc215f432de1b8debbd9144bf97b0 <6610c6fe4b8936c232048e6049bf77c70a6f759c
  3. Affected versionversion=525daaea459fc215f432de1b8debbd9144bf97b0 <cbb325bc150e8c0dbce004ac0e5516bcffc0de31
  4. Affected versionversion=60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff
  5. Affected versionversion=6.12.93 <6.12.112
  6. Affected versionversion=6.18.35 <6.18.54
  7. Affected versionversion=7.0.12 <7.1
  8. Affected versionversion=7.1
  9. Affected versionversion=9cebe4680bb9a72f80c6541eb24af06db7a1fbc9 <ab0678a0701ac4de499428dc1b321659bb74d272

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=47330cc875b36a1cf7b3543cb2cf90a7c603ce0e <e220c1242a643d97102a79f09b7ef3aa31276961; version=525daaea459fc215f432de1b8debbd9144bf97b0 <6610c6fe4b8936c232048e6049bf77c70a6f759c; version=525daaea459fc215f432de1b8debbd9144bf97b0 <cbb325bc150e8c0dbce004ac0e5516bcffc0de31; version=60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff; version=6.12.93 <6.12.112; version=6.18.35 <6.18.54; version=7.0.12 <7.1; version=7.1; version=9cebe4680bb9a72f80c6541eb24af06db7a1fbc9 <ab0678a0701ac4de499428dc1b321659bb74d272

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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