CVE-2026-68390

Unsafe Bluetooth parameter access via missing lock

Published Aug 10, 2026 · Updated Aug 10, 2026

Missing locking in the Linux kernel Bluetooth hci_sync component allows adjacent attackers to trigger unsafe list iteration or parameter access. The code calls hci_conn_params_lookup and accesses returned entries without holding hdev->lock, permitting concurrent mutation or release. Reachability requires an adjacent Bluetooth path; the public advisory does not identify the exact packet sequence or a deterministic outcome.

CVSS severity8.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing locking in the Linux kernel Bluetooth hci_sync component allows adjacent attackers to trigger unsafe list iteration or parameter access. The code calls hci_conn_params_lookup and accesses returned entries without holding hdev->lock, permitting concurrent mutation or release. Reachability requires an adjacent Bluetooth path; the public advisory does not identify the exact packet sequence or a deterministic outcome.

The record

CVE
CVE-2026-68390
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-414
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=6.19
  2. Affected versionversion=c530569adc19b5f0c62955de41f067bad34e3fe0 <8d892bec1dd134761cabec6ba23fe315d0f20f98
  3. Affected versionversion=c530569adc19b5f0c62955de41f067bad34e3fe0 <c363202ec841df36421ec280eea3d5f94f556143

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=c530569adc19b5f0c62955de41f067bad34e3fe0 <8d892bec1dd134761cabec6ba23fe315d0f20f98; version=c530569adc19b5f0c62955de41f067bad34e3fe0 <c363202ec841df36421ec280eea3d5f94f556143

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux CVE teamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-414Missing Lock Check

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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