CVE-2026-82803: armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereference
A vulnerability has been found in armink struct2json 1.0. This affects the function S2JSTRUCTGETstringELEMENT in the library struct2json/inc/s2jdef.h of the component JSON Deserialization. The manipulation of the argument valuestring leads to null pointer dereference. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Applications using armink struct2json 1.0 and invoking JSON deserialization paths that reach S2J_STRUCT_GET_string_ELEMENT are exposed. The issue can be triggered remotely, so systems that accept attacker-controlled JSON are the relevant attack surface.
What does an attacker need to exploit it?
An attacker needs to supply argument values that cause the valuestring argument handled by S2J_STRUCT_GET_string_ELEMENT to be null. No privileges or user interaction are indicated in the supplied severity vector.
What is the likely impact?
Successful exploitation causes a null pointer dereference, resulting in an availability impact. The supplied vector indicates no confidentiality or integrity impact.
Is public exploit information available?
Yes. The exploit has been publicly disclosed and may be used.