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Low 28 Bitcoin

refactor(core): refactor io/ble interface

Public commit record

What the developer wrote

Authored by tychovrahe

57/100 · Thin
refactor(core): refactor io/ble interface

[no changelog]
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope! No meaningful explanatory body
The short version

What changed, and why it matters

This commit is a code cleanup that rewrites how the Trezor firmware talks to its Bluetooth chip. Instead of sending one big generic 'command' packet that could describe many different actions, the code now uses a separate, specific function for each Bluetooth action (such as turn on, pair, disconnect, erase bonds). The change also tightens the security boundary between the app and the kernel by validating the pairing name and pairing code directly, rather than trusting a caller-built command structure. There is no direct evidence in the commit that this fixes an active security bug, but the old design made it easier for a caller to request unintended operations by crafting command data, and the new design removes that entire class of mistakes.

Recommended action

Treat this as a hardening/refactoring change rather than an urgent vulnerability fix. Reviewers should verify that all former BLE_SWITCH_ON callers now also call ble_set_name where needed, that ble_enter_pairing_mode rejects names longer than BLE_ADV_NAME_LEN, and that the new syscall verifiers correctly handle name_len == 0 and pairing_code pointer validation. No immediate user action is required.

Security signals we found

01

Removal of a generic command-dispatch union/enum that mixed control flow with caller-supplied data

02

Introduction of typed BLE API functions with explicit, per-call parameter validation

03

Syscall verifier now checks pairing name length and pairing code buffer directly rather than a caller-built command struct

04

Rust bindings no longer construct raw ble_command_t objects or compute data_len

05

No changelog entry and no CVE/advisory text in the commit message

Risk score

Why this scored 28/100

Our methodology →
Potential impact 5/30
Exploitability 5/25
Stealth signal 5/15
Affected reach 5/15
Confidence 5/10
Evidence quality 3/5
Human-validated context

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