CRITICALVulnerability
CVE-2026-71263
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.
Properties
- severity
- CRITICAL
- score
- 9.1
- cve_id
- CVE-2026-71263
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- published_at
- 2026-08-05T13:24:50.473
- last_modified
- 2026-08-26T17:13:24.800
Related Entities (2)
HAS_WEAKNESS (1)
→[Weakness]Out-of-bounds Write
DESCRIBED_BY (1)
→[Source]NVD
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