check reflector peer-tag length before subtracting the header size

F-TGDESKTOP-REFLECTOR-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

TelegramMessenger/tgcallsReported fixTelegramMessenger/tgcalls

check reflector peer-tag length before subtracting the header size

partially fixed publicly

details

Finding IDs: F-TGDESKTOP-REFLECTOR-001
Status: partially fixed publicly
Disclosure date: 13 Feb 2026
Note: both constructors subtract four only when the raw peer tag is 16 bytes. This closes the matched length-underflow path, not every issue in the broader report. Desktop release inclusion and the full report were not independently retested.

F-TGDESKTOP-REFLECTOR-001: Memory safety. Peer-tag length arithmetic underflows before memory access. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-TGDESKTOP-REFLECTOR-001

Security area (1seal assessment): Memory safety. A short peer tag must not underflow the length used for buffer operations. Reviewed 23 Sep 2026.

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