1sealsemantic last-mile verification

Research / Finding

chore(core): improve handling of large messages

F-TREZOR-THP-DOS-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
trezor/trezor-firmwareReported fixtrezor/trezor-firmware

chore(core): improve handling of large messages

fixed publicly
details
Finding IDs
F-TREZOR-THP-DOS-001
Status
fixed publicly
Reported via
security contact
Note
public fix commit 15975901acf6 on 2026-03-20 adds the missing `if buffer is None: return False` guard in the THP reassembly path, so oversized payload_length no longer passes as in the vulnerable pin 5ba0333910c1.

F-TREZOR-THP-DOS-001: Resource limits. Oversized protocol messages exhaust processing resources. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-TREZOR-THP-DOS-001

Security area (1seal assessment): Availability. Oversized protocol messages exhaust processing resources. Reviewed 24 Sep 2026.

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