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Advisory record · GHSA-cc53-p78w-23w9

Use-after-free from a comparator that answers inconsistently

CVSS 4.0, no score published

Published by the GitHub Advisory Database at 24 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
skiplistcrates.io>=0.0.0-0, <1.3.01.3.0
Identifiers
GHSA-cc53-p78w-23w9 · RUSTSEC-2026-0409
Published
24 Oct 2026
Updated
26 Oct 2026

Machine-written summary

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

Versions of the skiplist crate before 1.3.0 can free a node that is still linked when a Comparator or Ord implementation gives inconsistent answers for the same pair of values during one mutating call, such as insert, take_first, take or remove. A later call then reads the freed memory. No unsafe code is needed: a safe Ord implementation with the default comparator can trigger it, but only if the comparison is stateful or non-deterministic. Upgrade to skiplist 1.3.0 or later, where such contradictions cause a panic before the collection is modified.

Written 3 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

ScoreRatingCVSSVectorSource
Not published None 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N OSV
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 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.