---
id: CVE-2025-51679
title: An issue was discovered in openRISC OR1200 commit 83ac6b
summary: >-
  An issue was discovered in openRISC OR1200 commit 83ac6b. A mismatch between
  the RTL and netlist can lead to unexpected behavior.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-1281
published: '2026-08-26'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:04:24.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-51679'
references:
  - url: 'https://github.com/openrisc/mor1kx/issues/161'
    label: cve@mitre.org
  - url: 'https://mason.gmu.edu/~rsaravan/projects/synfuzz/cve/cve.html'
    label: cve@mitre.org
  - url: 'https://www.arxiv.org/abs/2504.18812'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00352
epssPercentile: 0.26051
ingestedAt: '2026-09-09T16:14:05.516Z'
---

## Overview

An issue was discovered in openRISC OR1200 commit 83ac6b. A mismatch between the RTL and netlist can lead to unexpected behavior.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.