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Informational 19 Bitcoin

feat(core): enable menu to return arbitrary values

Public commit record

What the developer wrote

Authored by Vojtěch Nevřela

85/100 · Strong
feat(core): enable menu to return arbitrary values

[no changelog]

Enables the Menu to return arbitrary values in preparation
for UI cleanup and modularisation.

This commit is only internal refactor, should have no
functional effect.

[no changelog]
✓ Specific, descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context
The short version

What changed, and why it matters

This commit is an internal user-interface refactor for Trezor firmware. It changes how on-screen menus are built so that each menu entry can carry an 'intent' (standard or danger) and can return arbitrary values, instead of only supporting a fixed cancel button. The commit message and diff show no new user-facing behavior; existing cancel buttons are converted into a new 'cancel leaf' abstraction. There is no direct evidence this introduces a security vulnerability, but any refactor that touches workflow cancellation paths deserves a careful look to ensure users can still abort dangerous actions.

Recommended action

Treat as a normal code-review item. Verify that every former `cancel=` path has been correctly converted to a `cancel_leaf` and that the resulting menu still raises the expected exception on user cancellation. Run UI/integration tests covering cancellation in signing workflows, especially on delizia and eckhart layouts where the intent-to-styling mapping is marked as temporary. No emergency action is warranted based on the supplied materials.

Security signals we found

01

Refactor of workflow cancellation UI paths

02

New 'danger' intent used to style destructive menu entries

03

Removal of dedicated cancel parameter in favor of generic leaf nodes

04

Changes to how menu results propagate (can now return arbitrary values)

05

No explicit security claim or CVE in commit message or references

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

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