CVE-2026-43334

HIGH EPSS 16.4%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
16.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥3.3  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/01bb4045d2306c266178f49ce0c3576d237a3040
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/425a22c5373d4e1b46492ab869074ebeeade61f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7ab69426e7ecbd18a222ee2ec87ca612d30197d7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91649c02c1baaa18cedf7fb425fa1f0f852c8183
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c8ff0ca6508535bccabd81c5c9dcc63de8a3d4fb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d05111bfe37bfd8bd4d2dfe6675d6bdeef43f7c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec17efb1ef91506cfd17a77692eaf4bbacb520ea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa14e0e19820b1bbdb42185c9c4efa950bcffef9
    Patch