CVE-2026-71255 — nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res()

CVE-2026-71255

nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res() PUBLISHED

Description (CNA)

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recv_read_device_identification_res function (FC 0x2B/MEI 0x0E, Read Device Identification) in nanomodbus.c. The server-supplied object_length field (0-246) is validated only against the remaining PDU size (res_size_left) and is never validated against the caller-supplied buffers_length parameter.

Affected (CNA)

Vendor / product	Versions
debevv / nanoMODBUS	affected 0 through 1.23.0

CWE

CWE-787

References

https://github.com/debevv/nanoMODBUS
https://github.com/debevv/nanoMODBUS/blob/master/nanomodbus.c

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.