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Informational 19 Bitcoin

feat(core): notify host on power status change using internal notification system

Public commit record

What the developer wrote

Authored by tychovrahe

62/100 · Adequate
feat(core): notify host on power status change using internal notification system

[no changelog]
✓ Specific, 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 adds a way for the Trezor device to tell the connected computer or phone when its power source changes (for example, when USB is plugged in or a wireless charger is placed nearby). It also exposes two new status flags, usb_connected and wireless_connected, in the device's feature report. There is no direct security fix here; it is a feature that improves real-time status reporting.

Recommended action

No immediate security action is required. Reviewers may want to confirm that the new notification is rate-limited or debounced to avoid event flooding, and that host software handles the new Features fields gracefully. Consider whether exposing precise power-source state has any privacy implications for users.

Security signals we found

01

New notification event NOTIFY_POWER_STATUS_CHANGE added to sys/notify.h

02

Power monitoring driver now calls notify_send() on USB/wireless state transitions

03

Features message extended with usb_connected and wireless_connected optional booleans

04

Bootloader Features response now includes power-source state

05

No changes to authentication, cryptography, memory allocation, or trust boundaries

Risk score

Why this scored 19/100

Our methodology →
Potential impact 2/30
Exploitability 1/25
Stealth signal 1/15
Affected reach 3/15
Confidence 8/10
Evidence quality 4/5
Human-validated context

Community notes

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