CVE-2026-42996

CRITICAL

JS8Call < 2.3.1 and JS8Call-improved < 3.0 - Stack-based Buffer Overflow via Long Maidenhead Locator in APRSISClient.cpp

Title source: llm
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v4 10.0
EPSS 0.0048
EPSS Percentile 37.4%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:D/RE:M/U:Green

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (2)
JS8Call/JS8Call < 2.3.1
JS8Call-improved/JS8Call-improved < 3.0
Published May 01, 2026
Tracked Since May 01, 2026