clear MuSig nonce-related buffers on error paths

F-LEDGER-BTC-MUSIG-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

clear MuSig nonce-related buffers on error paths

fixed in public source; rollout not reverified

details

Finding IDs: F-LEDGER-BTC-MUSIG-001
Status: fixed in public source; rollout not reverified
Disclosure date: 27 Feb 2026
Note: nonce-related stack buffers are cleared through a shared cleanup path, including errors. This source-level mapping is limited to secret-buffer cleanup, not all MuSig security properties. Release inclusion and device rollout were not independently checked.

F-LEDGER-BTC-MUSIG-001: Secret handling. MuSig secret buffers are not cleared on the affected path. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

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

Security area (1seal assessment): Confidentiality. Nonce-derived secret material is cleared before returning from the signing operation. Reviewed 23 Sep 2026.

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