CVE-2026-64433

Kernel crash via unlocked Bluetooth parameter lookup

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in Linux Kernel Bluetooth MGMT allows local users to trigger a kernel crash through concurrent add and remove device commands. add_device_complete() looks up hci_conn_params without hci_dev_lock and later reads params->flags after remove_device() can free the object. Reaching the race requires CAP_NET_ADMIN access to Bluetooth management sockets; the demonstrated consequence is an availability-only kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel Bluetooth MGMT allows local users to trigger a kernel crash through concurrent add and remove device commands. add_device_complete() looks up hci_conn_params without hci_dev_lock and later reads params->flags after remove_device() can free the object. Reaching the race requires CAP_NET_ADMIN access to Bluetooth management sockets; the demonstrated consequence is an availability-only kernel crash.

The record

CVE
CVE-2026-64433
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <9531014c60c804e16099885d4a98aedcf31bce8d
  2. Affected versionversion=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <b346efa825b5e4386f19bc63f81141652d496ec4
  3. Affected versionversion=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <fa85d985f614bc3feb343000f14a1072e99b0df1
  4. Affected versionversion=28826a89fdfd49f3291980c2e68b8a7c5d55e199 <e4369e4e970f3fa4676b76be14c1d315c87f22b6
  5. Affected versionversion=31492b8386e5a243df26ca4a9421f6b041f414d5 <caed4a96d55757c139a899744657c032b6186665
  6. Affected versionversion=6.12.30 <6.12.96
  7. Affected versionversion=6.14.8 <6.15
  8. Affected versionversion=6.15
  9. Affected versionversion=6.6.92 <6.6.145
  10. Affected versionversion=7e370545b8bdb54ed7f1ae485d6d24d3b62a0b53

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <9531014c60c804e16099885d4a98aedcf31bce8d; version=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <b346efa825b5e4386f19bc63f81141652d496ec4; version=1e2e3044c1bc64a64aa0eaf7c17f7832c26c9775 <fa85d985f614bc3feb343000f14a1072e99b0df1; version=28826a89fdfd49f3291980c2e68b8a7c5d55e199 <e4369e4e970f3fa4676b76be14c1d315c87f22b6; version=31492b8386e5a243df26ca4a9421f6b041f414d5 <caed4a96d55757c139a899744657c032b6186665; version=6.12.30 <6.12.96; version=6.14.8 <6.15; version=6.15; version=6.6.92 <6.6.145; version=7e370545b8bdb54ed7f1ae485d6d24d3b62a0b53

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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