CVE-2022-29219Network attack vector

Consensus split via rounded uint64 slashing values

Published May 24, 2022 · Updated Apr 23, 2025

Integer overflow in ChainSafe Systems Lodestar before 0.36.0 allows remote attackers to split consensus via crafted slashings. Slashing validation stores Slot and Epoch uint64 values as JavaScript numbers, so values above 2^53 are rounded before validity checks. A malicious slashing must be included on-chain; affected nodes can reject valid slashings or propose blocks the network rejects.

CVSS severity7.5
High
EPSS probability1.29%
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 ChainSafe Systems Lodestar before 0.36.0 allows remote attackers to split consensus via crafted slashings. Slashing validation stores Slot and Epoch uint64 values as JavaScript numbers, so values above 2^53 are rounded before validity checks. A malicious slashing must be included on-chain; affected nodes can reject valid slashings or propose blocks the network rejects.

The record

CVE
CVE-2022-29219
Published
May 24, 2022
Updated
Apr 23, 2025
Vendor
ChainSafe Systems
Product
Lodestar
Classifications
CWE-190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.36.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ChainSafe Systems · Lodestarversion=< 0.36.0

Published CVSS scores

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

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

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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