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Low 26 Bitcoin

Properly exclude SWAP-related code if ENABLE_SWAP != 1

Public commit record

What the developer wrote

Authored by Ilya Artemov

50/100 · Thin
Properly exclude SWAP-related code if ENABLE_SWAP != 1
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
The short version

What changed, and why it matters

This commit is a build-system cleanup for Ledger's Bitcoin app. It wraps all code related to the optional 'SWAP' feature inside #ifdef HAVE_SWAP guards so that, when the app is compiled without SWAP support, none of that code is compiled or linked. The change removes unconditional references to swap-specific global variables and functions from non-swap source files. On its own this is a hardening/compilation-fix change rather than a fix for an active, exploitable vulnerability in already-shipped code.

Recommended action

Treat as a defensive build-hardening commit. Review that HAVE_SWAP is correctly defined in all build configurations and that no other optional feature leaves similar dead-code references. No urgent patch deployment is indicated by the diff alone, but verify the change compiles cleanly for both SWAP and non-SWAP targets.

Security signals we found

01

Build-time feature gating for optional SWAP code paths

02

Removal of unconditional references to swap-specific globals from core handlers

03

No change to transaction signing, address derivation, or user-confirmation logic when SWAP is enabled

04

No explicit vulnerability, CVE, or security incident described in commit message

Risk score

Why this scored 26/100

Our methodology →
Potential impact 5/30
Exploitability 3/25
Stealth signal 4/15
Affected reach 5/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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