---
id: pr-vllm-25106
repo: vllm-project/vllm
pr: 25106
title: '[Bug] Fix `returned_lse` not Defined issue'
author: yewentao256
date: '2025-09-18'
url: https://github.com/vllm-project/vllm/pull/25106
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- mla
techniques: []
hardware_features: []
kernel_types:
- attention
- mla
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 75fb112d80f680624dc99a00e02be6a45661f948
inclusion_reason: kernel file changes
changed_paths:
- vllm/v1/attention/backends/mla/cutlass_mla.py
head_ref_oid: 99f55a388b6b8d12d76a249060c0b0f8881269de
artifact_dir: evidence/pull-bundles/vllm/gh-25106
---
# [Bug] Fix `returned_lse` not Defined issue

- Repository: `vllm-project/vllm`
- PR: [25106](https://github.com/vllm-project/vllm/pull/25106)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/v1/attention/backends/mla/cutlass_mla.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-25106`
