CVE-2020-36211

Data race via unbounded Send and Sync

Published Jan 22, 2021 · Updated Aug 4, 2024

A data race in the gfwx Rust crate before 0.3.0 allows local users to trigger memory corruption via unsafely shared ImageChunkMut values. ImageChunkMut unconditionally implements Send and Sync without requiring T to satisfy those thread-safety bounds, allowing non-thread-safe data to cross thread boundaries and race. The issue requires local code execution using the crate and can produce undefined behavior, memory corruption, and potentially service interruption.

CVSS severity7.0
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A data race in the gfwx Rust crate before 0.3.0 allows local users to trigger memory corruption via unsafely shared ImageChunkMut values. ImageChunkMut unconditionally implements Send and Sync without requiring T to satisfy those thread-safety bounds, allowing non-thread-safe data to cross thread boundaries and race. The issue requires local code execution using the crate and can produce undefined behavior, memory corruption, and potentially service interruption.

The record

CVE
CVE-2020-36211
Published
Jan 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-662
Attack vector
local
Privileges
authenticated

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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4NVDAV:L/AC:M/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-662Improper Synchronization

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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