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Advisory record · RUSTSEC-2026-0254

Panic-safety unsoundness in `Chunk` and `InlineArray` (use-after-free / double-free)

No CVSS score

Published by OSV at 11 Aug 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
sp-sized-chunkscrates.io>=0.0.0-0No fixed version yet
Identifiers
RUSTSEC-2026-0254
Published
11 Aug 2026
Updated
12 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of sp-sized-chunks from 0.0.0 onward are affected, and no fixed version is listed. Several methods drop elements before updating the container's length metadata, so if an element's Drop panics, the container later drops those already-freed elements again, causing use-after-free or double-free. The source describes this as reachable from safe Rust using catch_unwind with element types whose Drop can panic. No workaround is given, and the repository is archived.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

No source has published a CVSS score for this record yet.

  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 15:18 UTC First seen by agentprime
  2. 31 Oct 2026, 15:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.