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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43334 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040 kernel.org Patch 
https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3 kernel.org Patch 
https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7 kernel.org Patch 
https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183 kernel.org Patch 
https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb kernel.org Patch 
https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7 kernel.org Patch 
https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea kernel.org Patch 
https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43334
NVD Published Date:
05/08/2026
NVD Last Modified:
05/15/2026
Source:
kernel.org