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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact total

Affected Vendors & Products

Vendors Products
Js8call
  • Js8call
  • Js8call-improved

No data.

No data.

References
Link Providers
https://www.spirityenterprise.com/pentest spirity
https://amateur-radio-resources.sourceforge.io/PDF/JS8APRS.pdf cve-icon cve-icon
https://github.com/JS8Call-improved/JS8Call-improved/commit/a6c7a19b82bbd7c2c0c892576f84d7449e8c7088 cve-icon cve-icon
https://github.com/JS8Call-improved/JS8Call-improved/security/advisories/GHSA-98hp-pjp7-w62x cve-icon cve-icon cve-icon
https://github.com/js8call/js8call/blob/fd721e8b67eed84cb3c09d018205ab9a53e1a8b1/APRSISClient.cpp#L89-L102 cve-icon cve-icon
History

Mon, 04 May 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Js8call
Js8call js8call
Js8call js8call-improved
Vendors & Products Js8call
Js8call js8call
Js8call js8call-improved

Sat, 02 May 2026 00:00:00 +0000

Type Values Removed Values Added
Title Stack-Based Buffer Overflow in JS8Call via APRSIS Transmission

Fri, 01 May 2026 22:45:00 +0000

Type Values Removed Values Added
References

Fri, 01 May 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 01 May 2026 07:45:00 +0000

Type Values Removed Values Added
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. 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.

Fri, 01 May 2026 07:00:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 10, 'vector': 'CVSS: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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-01T22:10:45.285Z

Reserved: 2026-05-01T06:42:18.918Z

Link: CVE-2026-42996

cve-icon Vulnrichment

Updated: 2026-05-01T13:24:29.761Z

cve-icon NVD

Status : Deferred

Published: 2026-05-01T07:15:59.787

Modified: 2026-05-01T23:16:18.233

Link: CVE-2026-42996

cve-icon Redhat

No data.