---
id: pr-vllm-28840
repo: vllm-project/vllm
pr: 28840
title: 'bugfix: correct attn output with base 2 or e'
author: staugust
date: '2025-11-28'
url: https://github.com/vllm-project/vllm/pull/28840
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: 9726e64530e391a4d617cf7ecb862b433698ff6d
inclusion_reason: kernel file changes
changed_paths:
- vllm/attention/ops/common.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/mla/common.py
head_ref_oid: 257b4e629a9d40369982f147b26f5f8be6ee4706
artifact_dir: evidence/pull-bundles/vllm/gh-28840
---
# bugfix: correct attn output with base 2 or e

- Repository: `vllm-project/vllm`
- PR: [28840](https://github.com/vllm-project/vllm/pull/28840)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

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

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-28840`
