RUSTSEC-2026-0254None▾ SunlitPanic-safety unsoundness in `Chunk` and `InlineArray` (use-after-free / double-free)
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
Several methods in sp-sized-chunks drop elements before updating the container's length/boundary metadata. If an element's Drop panics during the drop, the metadata update is skipped, so the container still treats the already-dropped elements as live. When the container is later dropped, its own Drop re-visits those slots and drops the freed elements again — a use-after-free / double-free reachable from safe Rust.
sp-sized-chunks is a fork of sized-chunks (companion advisory filed separately) and carries the same bug. The repository is archived and the crate is still on 0.1.0 with no fix available.
Box<T>).Drop (e.g. String) — confirmed under AddressSanitizer.All are reachable from safe Rust via catch_unwind with element types whose Drop can panic.
sp-sized-chunks >= 0.0.0-0Refer to the advisory for the patched release.
Connected by shared product, vendor, weakness, or advisory.