Is CVE-2026-43334 actively exploited?

No active exploitation of CVE-2026-43334 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43334 be exploited remotely?

Partially. CVE-2026-43334 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-43334?

CVE-2026-43334 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-43334

Published: May 8, 2026· Updated: May 12, 2026

8.8

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:5.7th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: SMP: force responder MITM requirements before building the pairing response

smp_cmd_pairing_req() currently builds the pairing response from the

initiator auth_req before enforcing the local BT_SECURITY_HIGH

requirement. If the initiator omits SMP_AUTH_MITM, the response can

also omit it even though the local side still requires MITM.

tk_request() then sees an auth value without SMP_AUTH_MITM and may

select JUST_CFM, making method selection inconsistent with the pairing

policy the responder already enforces.

When the local side requires HIGH security, first verify that MITM can

be achieved from the IO capabilities and then force SMP_AUTH_MITM in the

response in both rsp.auth_req and auth. This keeps the responder auth bits

and later method selection aligned.

NVD Source

Technical Analysis

CVE-2026-43334 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.