1sealsemantic last-mile verification

Research / Finding

reject empty chunks in streamed preimage handling

F-LEDGER-BTC-USTREAM-001

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

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Recorded evidence

—score not recorded
LedgerHQ/app-bitcoinReported fixLedgerHQ/app-bitcoin

reject empty chunks in streamed preimage handling

fixed in public source; rollout not reverified
details
Finding IDs
F-LEDGER-BTC-USTREAM-001
Status
fixed in public source; rollout not reverified
Disclosure date
Note
stream_preimage now rejects partial_data_len == 0. The patch matches the reported empty-chunk path. Mapping is by source comparison, without a claim of public vendor attribution or independently verified release rollout.

F-LEDGER-BTC-USTREAM-001: Input / state handling. Empty stream chunks violate parser assumptions. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

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

Security area (1seal assessment): Availability. The parser rejects an empty streamed chunk instead of proceeding through the malformed-input path. Reviewed 23 Sep 2026.

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