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Advisory record · RUSTSEC-2026-0255

Panic-safety unsoundness in `Chunk`, `RingBuffer`, 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
sized-chunkscrates.io>=0.0.0-0No fixed version yet
Identifiers
RUSTSEC-2026-0255
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.

The sized-chunks crate, all versions, is affected by a panic-safety bug in its Chunk, RingBuffer, and InlineArray types. If an element's Drop panics during certain methods, the container can later drop the same elements again, causing a double-free or use-after-free. The RingBuffer methods are only affected when the ringbuffer feature is enabled. No fixed version is listed, 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.