CVE-2026-71263

Critical

Open

TLP:CLEAR

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

NVD CVE.org

AI Analysis

No AI analysis yet.

Description

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.

Details

CVSS Score: 9.1
EPSS Score ⓘ: 0.28%

20.4th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Confidence: 90%
Published: Aug 5, 2026
Last Modified: Aug 10, 2026

Notes

0

Log in to add a note

No notes yet. Click "Add Note" to create the first analysis note.

Opinions

0

Log in to add an opinion

No opinions yet. Be the first to assess this intelligence.