CVE-2026-42996 PUBLISHED

Assigner: mitre
Reserved: 01.05.2026 Published: 01.05.2026 Updated: 01.05.2026

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

CVSS 4.0

CVSS 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
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	JS8Call
Product	JS8Call
Versions	Default: unknown affected from 0 to 2.3.1 (incl.)

Vendor	JS8Call-improved
Product	JS8Call-improved
Versions	Default: unaffected affected from 0 to 3.0 (excl.)

References

Problem Types

CWE-121 Stack-based Buffer Overflow CWE