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HIGH severity

CVE-2020-35891 — Ordnung

HIGH

CVE-2020-35891 is a high-severity (CVSS 7.5) CWE-415 vulnerability in ordnung_project ordnung. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

An issue was discovered in the ordnung crate through 2020-09-03 for Rust. compact::Vec violates memory safety via a remove() double free.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs72th percentile — riskier than 72% of all scored CVEsHighest risk
0.00%0.64%1.27%1.91%0.3%1.4%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2020-35891 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

An issue was discovered in the ordnung crate through 2020-09-03 for Rust. compact::Vec violates memory safety via a remove() double free.

Affected Products

1 product · 1 configurations
Application
ordnungordnung_project
≤ 2020-09-03
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 ordnung crate through 2020-09-03 for Rust…

rustsec.orgNVDJan 2021

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every ordnung_project ordnung deployment and check each version against the affected-products list above.

  2. Remediation status

    No patch has shipped for CVE-2020-35891 yet — track the ordnung_project ordnung advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

An issue was discovered in the ordnung crate through 2020-09-03 for Rust. compact::Vec violates memory safety via a remove() double free.
O3 Security · Runtime Protection

Is CVE-2020-35891 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

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CVE-2020-35891: Ordnung (High 7.5)