reject a derivation step at the array capacity boundary

F-LEDGER-BTC-OBO-001

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

—score not recorded

LedgerHQ/app-bitcoinReported fixLedgerHQ/app-bitcoin

reject a derivation step at the array capacity boundary

fixed in public source; rollout not reverified

details

Finding IDs: F-LEDGER-BTC-OBO-001
Status: fixed in public source; rollout not reverified
Disclosure date: 18 Feb 2026
Note: wallet parsing changes the derivation-length check from > to >= before writing a step. The reported boundary condition matches this public diff. Release inclusion and device rollout were not independently checked; public credit is not asserted.

F-LEDGER-BTC-OBO-001: Memory safety. Capacity handling has an off-by-one buffer error. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-LEDGER-BTC-OBO-001

Security area (1seal assessment): Memory safety. The corrected comparison prevents an array write when the derivation buffer is already full. Reviewed 23 Sep 2026.

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