CVE-2020-36453Public exploit

Memory corruption via unconditional Send and Sync

Published Aug 8, 2021 · Updated Aug 4, 2024

Data races in the Rust scottqueue crate 0.1.0 and earlier allow attackers to cause memory corruption through cross-thread queue use. The Queue type unconditionally declares Send and Sync for every T, permitting non-Send values to cross threads and non-Sync values to be accessed concurrently. When a consuming application places such a value in the queue and uses it across threads, the resulting undefined behavior can corrupt memory or crash the process.

CVSS severity8.1
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data races in the Rust scottqueue crate 0.1.0 and earlier allow attackers to cause memory corruption through cross-thread queue use. The Queue type unconditionally declares Send and Sync for every T, permitting non-Send values to cross threads and non-Sync values to be accessed concurrently. When a consuming application places such a value in the queue and uses it across threads, the resulting undefined behavior can corrupt memory or crash the process.

The record

CVE
CVE-2020-36453
Published
Aug 8, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 8, 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 vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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