CVE-2024-38359Public exploitNetwork attack vector

Node crash via unbounded onion payload allocation

Published Jun 20, 2024 · Updated Aug 2, 2024

Improper input validation in LND before 0.17.0 allows remote attackers to crash a Lightning node via crafted onion packets. HopPayload.Decode trusts a BigSize length value and allocates that many bytes before verifying the actual payload, permitting allocations up to 4 GB per packet. A node must process attacker-routed HTLC onion data; concurrent packets exhaust memory and terminate the daemon.

CVSS severity6.5
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in LND before 0.17.0 allows remote attackers to crash a Lightning node via crafted onion packets. HopPayload.Decode trusts a BigSize length value and allocates that many bytes before verifying the actual payload, permitting allocations up to 4 GB per packet. A node must process attacker-routed HTLC onion data; concurrent packets exhaust memory and terminate the daemon.

The record

CVE
CVE-2024-38359
Published
Jun 20, 2024
Updated
Aug 2, 2024
Vendor
Lightning Labs
Product
LND
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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

  1. Affected versionversion=< 0.17.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lightning Labs · LNDversion=< 0.17.0
Lightning Labs · LND (Lightning Network Daemon)version=0 <0.17.0

Published CVSS scores

6.5GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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