---
id: pr-sglang-10426
repo: sgl-project/sglang
pr: 10426
title: Fix correction bias undefined behavior for nvfp4 models
author: fzyzcjy
date: '2025-09-15'
url: https://github.com/sgl-project/sglang/pull/10426
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
- nvfp4
techniques:
- kernel-fusion
hardware_features:
- fp4
- nvfp4
kernel_types:
- moe
languages:
- cuda-cpp
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 258d02c86d93511db241120de56d3f8b50f5ed0d
inclusion_reason: kernel file changes
changed_paths:
- python/sglang/srt/models/deepseek_v2.py
- sgl-kernel/csrc/moe/moe_fused_gate.cu
head_ref_oid: f7ca191613bee67c6c7086cf0924977adc3889a0
artifact_dir: evidence/pull-bundles/sglang/gh-10426
---
# Fix correction bias undefined behavior for nvfp4 models

- Repository: `sgl-project/sglang`
- PR: [10426](https://github.com/sgl-project/sglang/pull/10426)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/sglang/srt/models/deepseek_v2.py`
- `sgl-kernel/csrc/moe/moe_fused_gate.cu`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-10426`
