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Description

JS8Call through 2.3.1 and JS8Call-improved before 3.0 have a stack-based buffer overflow via a radio transmission of @APRSIS GRID followed by a long Maidenhead locator. This occurs in grid2deg in APRSISClient.cpp.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-01 | Updated 2026-05-01 | Assigner mitre




CRITICAL: 10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P/AU:Y/R:U/V:D/RE:M/U:Green

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Default status
unknown

Any version
affected

Default status
unaffected

Any version before 3.0
affected

References

github.com/...proved/security/advisories/GHSA-98hp-pjp7-w62x exploit

github.com/...proved/security/advisories/GHSA-98hp-pjp7-w62x

amateur-radio-resources.sourceforge.io/PDF/JS8APRS.pdf

github.com/...ed84cb3c09d018205ab9a53e1a8b1/APRSISClient.cpp

github.com/...ommit/a6c7a19b82bbd7c2c0c892576f84d7449e8c7088

cve.org (CVE-2026-42996)

nvd.nist.gov (CVE-2026-42996)

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