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GHSA-9q5j-jm53-v7vr

CRITICAL

lz4-sys vulnerable to memory corruption via issue in liblz4

Also known asRUSTSEC-2022-0051
Published
Sep 1, 2022
Updated
Nov 8, 2023
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🦀lz4-sys

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

lz4-sys up to v1.9.3 bundles a version of liblz4 that is vulnerable to CVE-2021-3520.

Attackers could craft a payload that triggers an integer overflow upon decompression, causing an out-of-bounds write.

The flaw has been corrected in version v1.9.4 of liblz4, which is included in lz4-sys 1.9.4.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.iolz4-sysall versions1.9.4

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for lz4-sys. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update lz4-sys to 1.9.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9q5j-jm53-v7vr is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-9q5j-jm53-v7vr is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-9q5j-jm53-v7vr. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

lz4-sys up to v1.9.3 bundles a version of liblz4 that is vulnerable to [CVE-2021-3520](https://nvd.nist.gov/vuln/detail/CVE-2021-3520). Attackers could craft a payload that triggers an integer overflow upon decompression, causing an out-of-bounds write. The flaw has been corrected in version v1.9.4 of liblz4, which is included in lz4-sys 1.9.4.
O3 Security · Impact-Aware SCA

Is GHSA-9q5j-jm53-v7vr in your dependencies?

O3 detects GHSA-9q5j-jm53-v7vr across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.