CVE-2026-46056

Kernel memory corruption via unlocked Bluetooth connection access

Published May 27, 2026 · Updated May 27, 2026

Use-after-free in Linux Kernel allows physically proximate attackers to trigger freed kernel-object access through Bluetooth SSP events. The hci_user_passkey_notify_evt() and hci_keypress_notify_evt() handlers use hci_conn fields after releasing the hdev lock, allowing concurrent teardown to free the object. Exploitation requires adjacent Bluetooth access and a Secure Simple Pairing race; no demonstrated post-corruption outcome is reported.

CVSS severity8.8
High
EPSS probability0.26%
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 allows physically proximate attackers to trigger freed kernel-object access through Bluetooth SSP events. The hci_user_passkey_notify_evt() and hci_keypress_notify_evt() handlers use hci_conn fields after releasing the hdev lock, allowing concurrent teardown to free the object. Exploitation requires adjacent Bluetooth access and a Secure Simple Pairing race; no demonstrated post-corruption outcome is reported.

The record

CVE
CVE-2026-46056
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=3.7
  2. Affected versionversion=92a25256f142d55e25f9959441cea6ddeabae57e <01a6431766c35dfedb86e0cb5d3fc80c6d604a47
  3. Affected versionversion=92a25256f142d55e25f9959441cea6ddeabae57e <204028af77a265e31ceb4ba7f643349a3cca72b2
  4. Affected versionversion=92a25256f142d55e25f9959441cea6ddeabae57e <85fa3512048793076eef658f66489112dcc91993
  5. Affected versionversion=92a25256f142d55e25f9959441cea6ddeabae57e <8c6443bb9257b780986fb67ec08565bf48ecb8d7
  6. Affected versionversion=92a25256f142d55e25f9959441cea6ddeabae57e <e08d75753db17aa943d7622f09d9c217b5bfd3b8

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.7; version=92a25256f142d55e25f9959441cea6ddeabae57e <01a6431766c35dfedb86e0cb5d3fc80c6d604a47; version=92a25256f142d55e25f9959441cea6ddeabae57e <204028af77a265e31ceb4ba7f643349a3cca72b2; version=92a25256f142d55e25f9959441cea6ddeabae57e <85fa3512048793076eef658f66489112dcc91993; version=92a25256f142d55e25f9959441cea6ddeabae57e <8c6443bb9257b780986fb67ec08565bf48ecb8d7; version=92a25256f142d55e25f9959441cea6ddeabae57e <e08d75753db17aa943d7622f09d9c217b5bfd3b8

Published CVSS scores

8.8Linux kernel CNACVSS: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.

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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-416Use After Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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