CVE-2020-36214Public exploitNetwork attack vector

Memory corruption via unconditional Send implementations

Published Jan 22, 2021 · Updated Aug 4, 2024

Data race in the multiqueue2 crate before 0.1.7 allows attackers to corrupt memory or crash a process by moving non-Send values across threads. Four unsafe Send implementations omit a T: Send bound, causing safe Rust to treat InnerSend, InnerRecv, FutInnerSend, and FutInnerRecv values as transferable across threads regardless of their contained type. Exploitation requires a consuming application to place an attacker-influenced non-Send value into an affected queue; demonstrated outcomes include memory corruption, a memory leak, and a process crash.

CVSS severity5.9
Medium
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data race in the multiqueue2 crate before 0.1.7 allows attackers to corrupt memory or crash a process by moving non-Send values across threads. Four unsafe Send implementations omit a T: Send bound, causing safe Rust to treat InnerSend, InnerRecv, FutInnerSend, and FutInnerRecv values as transferable across threads regardless of their contained type. Exploitation requires a consuming application to place an attacker-influenced non-Send value into an affected queue; demonstrated outcomes include memory corruption, a memory leak, and a process crash.

The record

CVE
CVE-2020-36214
Published
Jan 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-662
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9RustSec Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-662Improper Synchronization

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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