🛡️ RUSTSEC-2026-0129 — dahl-salso

Buffer overflow in Clusterings::from_i32_column_major_order()

The from_i32_column_major_order method can create inconsistent internal

state. When labels length and n_items mismatch, n_clusterings becomes

labels.len() / n_items (truncated), but subsequent calls to label() use

indices that exceed the internal data bounds, causing a buffer overflow.

For example, Clusterings::from_i32_column_major_order(&[1,2,3,4,5], 3)

creates clusterings with n_clusterings = 5/3 = 1. Then

clusterings.label(1, 0) accesses index 1*3 = 3, but only 3 elements

exist (indices 0,1,2), causing out-of-bounds access.

This can be triggered through safe public APIs —

from_i32_column_major_order() and label() — with no unsafe required

from the caller.