Mmastodon TechnologyCybersecurity first seen 1 d ago, last 1 d ago, peak #7

Critical integer underflow flaw reported in DStarGateway software

Original: CVE-2026-122992: CRITICAL integer underflow in dstarCallsignToAPRS (G4KLX & F4FXL DStarGateway https:// radar.offseq.com

A new vulnerability, CVE-2026-122992, has been disclosed affecting the G4KLX and F4FXL DStarGateway implementations used in amateur radio D-STAR gateways. The flaw is an integer underflow in the dstarCallsignToAPRS function in APRSUtils.cpp, and it is rated critical. Users running affected versions are expected to check for patches or updated builds.

Why now: A newly published critical CVE in widely used ham radio gateway software is being circulated among security and amateur radio communities.

G4KLX DStarGatewayF4FXL DStarGatewayCVE-2026-122992OffSeq

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Evidence

• CVE-2026-122992: CRITICAL integer underflow in dstarCallsignToAPRS (G4KLX & F4FXL DStarGateway https:// radar.offseq.com/threat/in-g4k lx-dstargateway-and-f4fxl-dstargateway-before-7b75de6-dstarcallsigntoaprs-in-aprsutilscpp-has-an-7a56517465ac4a02 # OffSeq # Infosec # HamRadio… · offseq@infosec.exchange · 2

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