CVE-2020-36452Network attack vector

Memory corruption via panic-unsafe deque cloning

Published Aug 8, 2021 · Updated Aug 4, 2024

Memory corruption in the array-tools crate before 0.3.2 allows attackers to corrupt process memory by reaching a clone panic. FixedCapacityDequeLike<T, A>::clone() leaves partially initialized storage unguarded during unwinding, causing uninitialized elements to be dropped when T::clone() panics. Reachability requires a consuming application to clone a deque whose element type has a panicking Clone implementation; the hosting process can crash or exhibit undefined behavior.

CVSS severity9.8
Critical
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the array-tools crate before 0.3.2 allows attackers to corrupt process memory by reaching a clone panic. FixedCapacityDequeLike<T, A>::clone() leaves partially initialized storage unguarded during unwinding, causing uninitialized elements to be dropped when T::clone() panics. Reachability requires a consuming application to clone a deque whose element type has a panicking Clone implementation; the hosting process can crash or exhibit undefined behavior.

The record

CVE
CVE-2020-36452
Published
Aug 8, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-908, CWE-909
Attack vector
network
Privileges
unauthenticated

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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
CWE-909Missing Initialization of Resource

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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