---
id: pr-vllm-25478
repo: vllm-project/vllm
pr: 25478
title: '[BugFix] Fix MLA assert with CUTLASS MLA'
author: LucasWilkinson
date: '2025-09-24'
url: https://github.com/vllm-project/vllm/pull/25478
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: 9df8da548e920f83d4f7710e481f106c2ac92d31
inclusion_reason: kernel file changes
changed_paths:
- vllm/v1/attention/backends/mla/common.py
head_ref_oid: 486d9fe256b0e5337aa71b140c5bb795f58bff13
artifact_dir: evidence/pull-bundles/vllm/gh-25478
---
# [BugFix] Fix MLA assert with CUTLASS MLA

- Repository: `vllm-project/vllm`
- PR: [25478](https://github.com/vllm-project/vllm/pull/25478)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

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

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-25478`
