AIKIDO-2026-664390
faiss-cpu is vulnerable to Denial of Service (DoS)
41
Medium Risk
This Affects:
faiss-cpuTL;DR
The faiss index deserialization path in index_read.cpp accepts malformed serialized index payloads that can crash the process, dereference null inner indexes, or spend excessive CPU during load. Before the fix, non-canonical bool encodings were read with READ1 into bool storage, null inner indexes in IndexIDMap and IndexBinaryFromFloat wrappers were accepted, and large IndexLattice r2 values could trigger decode-cache build exhaustion. The release adds READ1_BOOL validation, rejects null inner indexes at deserialization, caps configurable IndexLattice r2, and initializes Top1BlockResultHandler ids_tab entries to avoid uninitialized reads on empty search paths.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application loads serialized Faiss indexes from untrusted or attacker-influenced sources.
Background info
faiss-cpu is vulnerable to Denial of Service (DoS) in versions 1.0.0 - 1.14.2.
How to fix this
Upgrade the faiss-cpu library to the patch version.
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SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
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