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Advisory record · RUSTSEC-2026-0291

Double free in `OwnedAlloc::drop_in_place` when the contained value's `Drop` panics

No CVSS score

Published by OSV at 9 Sept 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
owned-alloccrates.io>=0.0.0-0No fixed version yet
Identifiers
RUSTSEC-2026-0291
Published
9 Sept 2026
Updated
21 Sept 2026

Machine-written summary

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

Versions of owned-alloc from 0.0.0 onward are affected, and no fixed version is listed. The bug is in OwnedAlloc::drop_in_place and MaybeUninitAlloc::drop_in_place: if the stored value's Drop panics, the value is dropped a second time during unwinding, causing a double free and a use-after-free. An attacker needs no unsafe code, only a program that stores a value whose Drop can panic and calls either method; the source does not describe a remote attack. No fix is listed, so the source suggests avoiding these methods for such types.

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, 15:17 UTC First seen by agentprime
  2. 31 Oct 2026, 15:17 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.