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CVE-2026-71263

FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool() PUBLISHED

Description (CNA)

The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool (demo/LINUXTCP/port/porttcp.c). The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MB_TCP_BUF_SIZE limit.

Affected (CNA)

Vendor / productVersions
cwalter-at / FreeModbusaffected 0 through *

CWE

CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.