CVE-2022-28936Network attack vector

Consensus service interruption via oversized viewchange message

Published May 15, 2022 · Updated Aug 3, 2024

Integer overflow in FISCO-BCOS 3.0.0-rc2 allows remote attackers controlling a malicious node to interrupt service via a large viewchange packet. The viewchange message-processing path accepts a packet large enough to overflow an integer; public sources do not identify the exact function or arithmetic operation. The attacker must participate as a blockchain node, and the demonstrated consequence is loss of availability rather than data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in FISCO-BCOS 3.0.0-rc2 allows remote attackers controlling a malicious node to interrupt service via a large viewchange packet. The viewchange message-processing path accepts a packet large enough to overflow an integer; public sources do not identify the exact function or arithmetic operation. The attacker must participate as a blockchain node, and the demonstrated consequence is loss of availability rather than data disclosure or modification.

The record

CVE
CVE-2022-28936
Published
May 15, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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
7.5NIST 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.

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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-190Integer Overflow or Wraparound
T1498Network Denial of Service

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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