CVE-2020-36318Public exploitNetwork attack vector

Memory corruption via duplicated VecDeque elements

Published Apr 11, 2021 · Updated Aug 4, 2024

Memory corruption in Rust standard library 1.48.0 allows context-dependent attackers to trigger use-after-free through VecDeque operations. VecDeque::make_contiguous mishandles a wrapped buffer after reserve and push operations, duplicating an element so later pop_front calls remove it twice. Reachability depends on application code invoking this sequence on attacker-influenced data; the bounded consequences are use-after-free or double free.

CVSS severity9.8
Critical
EPSS probability1.68%
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 Rust standard library 1.48.0 allows context-dependent attackers to trigger use-after-free through VecDeque operations. VecDeque::make_contiguous mishandles a wrapped buffer after reserve and push operations, duplicating an element so later pop_front calls remove it twice. Reachability depends on application code invoking this sequence on attacker-influenced data; the bounded consequences are use-after-free or double free.

The record

CVE
CVE-2020-36318
Published
Apr 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 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

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/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 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-415Double Free
CWE-416Use After Free

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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