Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · RUSTSEC-2026-0306

`hex_decode_unchecked` AVX2 path reads past `src`

No CVSS score

Published by OSV at 20 Sept 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
faster-hexcrates.io>=0.3.0, <0.10.10.10.1
Identifiers
RUSTSEC-2026-0306
Published
20 Sept 2026
Updated
23 Sept 2026

Machine-written summary

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

Affected: faster-hex from 0.3.0 up to but not including 0.10.1. On x86 and x86_64 with AVX2 enabled, a safe call to hex_decode_unchecked with a short src and a dst of at least 32 bytes makes the AVX2 path read past the end of src. Upgrade to faster-hex 0.10.1 or later; no workaround is listed.

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

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

  • 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.