CVE-2020-13759Network attack vector

VM network interruption via torn descriptor writes

Published Jun 2, 2020 · Updated Aug 4, 2024

Improper synchronization in rust-vmm vm-memory before 0.1.1 and 0.2.x before 0.2.1 allows remote attackers to interrupt VM networking. The read_obj and write_obj functions use memcpy without guaranteeing atomic two-byte descriptor-index access, allowing the driver to observe a partially written index. Exploitation requires a vulnerable VMM with virtio-net traffic on aarch64 with musl or glibc, or x86_64 with musl; the resulting torn access stops packet transmission.

CVSS severity7.5
High
EPSS probability1.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper synchronization in rust-vmm vm-memory before 0.1.1 and 0.2.x before 0.2.1 allows remote attackers to interrupt VM networking. The read_obj and write_obj functions use memcpy without guaranteeing atomic two-byte descriptor-index access, allowing the driver to observe a partially written index. Exploitation requires a vulnerable VMM with virtio-net traffic on aarch64 with musl or glibc, or x86_64 with musl; the resulting torn access stops packet transmission.

The record

CVE
CVE-2020-13759
Published
Jun 2, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CWE-662, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2020CVE 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

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5RustSec Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-662Improper Synchronization
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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