8.8

CVE-2026-43334

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.3 < 5.10.253
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.203
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.168
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.134
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.81
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.22
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.12
Linux ≫ Linux Kernel Version7.0 Updaterc1
Linux ≫ Linux Kernel Version7.0 Updaterc2
Linux ≫ Linux Kernel Version7.0 Updaterc3
Linux ≫ Linux Kernel Version7.0 Updaterc4
Linux ≫ Linux Kernel Version7.0 Updaterc5
Linux ≫ Linux Kernel Version7.0 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.162
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3
Patch
https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7
Patch
https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040
Patch
https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183
Patch
https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb
Patch
https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9
Patch
https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea
Patch
https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7
Patch