CVE-2026-71263 — FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool()
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 …
Published: 2026-08-05 · CVSS: 9.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7