CVE-2020-36467

Availability impact via mutable aliasing

Published Aug 8, 2021 · Updated Aug 4, 2024

Memory-safety issue in cgc crate for Rust through 0.4.0 allows attackers to cause availability impact via Ptr::get aliasing. The Ptr::get function returns multiple mutable references to the same object, violating Rust's mutable-alias rules and enabling undefined behavior when the references are used. Reaching the flaw requires code that invokes this unsafe pointer API; the published record does not establish a specific network or local attacker path, and the bounded consequence is potential service interruption or process failure.

CVSS severity5.9
Medium
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-safety issue in cgc crate for Rust through 0.4.0 allows attackers to cause availability impact via Ptr::get aliasing. The Ptr::get function returns multiple mutable references to the same object, violating Rust's mutable-alias rules and enabling undefined behavior when the references are used. Reaching the flaw requires code that invokes this unsafe pointer API; the published record does not establish a specific network or local attacker path, and the bounded consequence is potential service interruption or process failure.

The record

CVE
CVE-2020-36467
Published
Aug 8, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-657
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

5.9GitLab 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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-657Violation of Secure Design Principles

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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