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Subhankar Mishra

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#artificial intelligence Preprint Aug 2026

Query-Side Attacks on GNN-Based KGQA: Tracing Failures from Entity Linking to Answer Generation

GNN-based Knowledge Graph Question Answering (KGQA) pipelines process queries through four discrete stages: entity linking, subgraph retrieval, GNN reasoning, and answer generation. Standard robustness evaluations conflate stage-level failures into a single end-to-end metric, obscuring both the source of brittleness an...

Pankaj Kumar, Subhankar Mishra · 0 citations
#machine learning Preprint Aug 2026

PAGE: Partition-Aware Gated KV-Cache Eviction

KV-cache eviction can do more than compress. In long-context LLMs, keeping only some cached tokens sometimes matches or exceeds full-cache accuracy, because many redundant prefill tokens otherwise dilute attention away from the tokens that carry the answer. This benefit is not uniform, and evicting the wrong tokens can...

Pankaj Kumar, Subhankar Mishra · 0 citations
Jul 2026

Attacking Graph Foundation Models Through Their Shared Representation

This work attacks the alignment layer, the component that separates a graph foundation model from a graph neural network, and shows it is a distinct attack surface that prior work has not studied.

Pankaj Kumar, Subhankar Mishra · 0 citations

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