Issues

• knn_db_parallel_impl (#5000) returns wrong results when search is called inside an OpenMP parallel region

  facebookresearch/faiss#5702 · Filter by author novain-shibu opened on Oct 3, 2026

• IndexBinaryFlat: single-query search uses one thread (and gets slower with more threads)

  facebookresearch/faiss#5700 · Filter by author novain-shibu opened on Oct 3, 2026

• faiss-gpu / faiss-gpu-cuvs pip wheels missing Blackwell support (sm_100, sm_120)

  facebookresearch/faiss#5698 · Filter by author haoweiyu-kumo opened on Oct 2, 2026

• IndexFlatL2 silently drops rows containing non-finite components from search results (-1 slots) without any error (1.15.0)

  facebookresearch/faiss#5684 · Filter by author JoeyLYZ666 opened on Sep 29, 2026

• IndexFlatL2 search loses results (-1 padding, then no results at all) when squared distances overflow float32

  facebookresearch/faiss#5683 · Filter by author JoeyLYZ666 opened on Sep 29, 2026
  1

• Compilation fails when compiled with -march=znver4: error: no member named 'clear' in 'faiss::simd32uint16_tpl<faiss::SIMDLevel::AVX512>'

  facebookresearch/faiss#5608 · Filter by author yurivict opened on Sep 8, 2026

• Panorama merge_from corrupts merged vectors

  facebookresearch/faiss#5607 · Filter by author leemeii opened on Sep 8, 2026

• clone_index() loses ArrayInvertedListsPanorama storag

  facebookresearch/faiss#5606 · Filter by author leemeii opened on Sep 8, 2026

• IndexScalarQuantizer.merge_from() accepts incompatible trained ranges and silently decodes merged vectors incorrectly

  facebookresearch/faiss#5599 · Filter by author leemeii opened on Sep 7, 2026

• IndexFastScan::merge_from silently ignores nonzero add_id

  facebookresearch/faiss#5590 · Filter by author leemeii opened on Sep 7, 2026

• IndexIVF helper APIs ignore quantizer_params and return inconsistent results

  facebookresearch/faiss#5589 · Filter by author leemeii opened on Sep 6, 2026

• IndexShardsIVF silently drops SearchParametersIVF.sel

  facebookresearch/faiss#5584 · Filter by author leemeii opened on Sep 5, 2026

• IndexShards applies selectors to local IDs with successive_ids enabled

  facebookresearch/faiss#5581 · Filter by author rioyu123 opened on Sep 5, 2026

• IndexIVFFlatDedup.reset() leaves stale duplicate-chain IDs searchable

  facebookresearch/faiss#5580 · Filter by author leemeii opened on Sep 5, 2026

• IndexIVF range_search ignores SearchParametersIVF.max_codes

  facebookresearch/faiss#5579 · Filter by author leemeii opened on Sep 5, 2026

• IndexIDMap2::reset leaves stale reverse-map entries

  facebookresearch/faiss#5578 · Filter by author leemeii opened on Sep 5, 2026

• IndexIVFIndependentQuantizer leaves its public ntotal stale after add

  facebookresearch/faiss#5577 · Filter by author leemeii opened on Sep 5, 2026

• IndexFlat1D.remove_ids leaves a stale sorted permutation; the next search fails

  facebookresearch/faiss#5576 · Filter by author leemeii opened on Sep 5, 2026

• IndexEDEN / IndexIVFEDEN with unbiased 1-bit EDEN can return negative METRIC_L2 distances

  facebookresearch/faiss#5567 · Filter by author leemeii opened on Sep 3, 2026
  2

• IndexIVFFlatDedup.remove_ids returns 0 and does not decrement ntotal after removing a duplicate-vector ID

  facebookresearch/faiss#5566 · Filter by author leemeii opened on Sep 3, 2026

• QT_8bit_direct_signed takes the integer distance computer on x86 and the float one on aarch64

  facebookresearch/faiss#5550 · Filter by author mark124 opened on Sep 1, 2026

• Feature proposal: Projection-Augmented Graph as a new CPU ANN index

  facebookresearch/faiss#5496 · Filter by author KejingLu-810 opened on Aug 2, 2026
  3

  

• Support HNSW Search using GPUs

  facebookresearch/faiss#5458 · Filter by author premal opened on Jul 23, 2026

• Support for free-threaded (no-GIL) Python builds

  feature request
  Feature

  facebookresearch/faiss#5418 · Filter by author rafalh opened on Jul 14, 2026
  3

  

• IndexIVFFlat with METRIC_L1 changes nprobe=1 Top-k after translating all vectors and queries

  facebookresearch/faiss#5410 · Filter by author mmnhgo opened on Jul 12, 2026