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CRITICAL severity

CVE-2021-29936 — adtensor

CRITICAL

CVE-2021-29936 is a critical-severity (CVSS 9.8) CWE-908 vulnerability in adtensor. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Free of uninitialized memory in adtensor

Also known asRUSTSEC-2021-0045
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs70th percentile — riskier than 70% of all scored CVEsHighest risk
0.00%0.61%1.22%1.83%0.5%1.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-29936 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀adtensor

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

An issue was discovered in the adtensor crate through 2021-01-11 for Rust. There is a drop of uninitialized memory via the FromIterator implementation for Vector and Matrix.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🦀crates.ioadtensorall versionsNo fix

Affected Products

1 product · 1 configurations
Application
adtensoradtensor_project
≤ 2021-01-11
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An issue was discovered in the adtensor crate through 2021-01-11 for Rus…

rustsec.orgNVDApr 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for adtensor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    No patched version of adtensor has shipped for CVE-2021-29936 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    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.

Frequently Asked Questions

An issue was discovered in the adtensor crate through 0.0.3 for Rust. There is a drop of uninitialized memory via the FromIterator implementation for Vector and Matrix.
O3 Security · Impact-Aware SCA

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CVE-2021-29936: adtensor: Free of uninitialized memory