CVE-2019-20430Public exploitNetwork attack vector

Metadata-server crash via oversized eadatasize field

Published Jan 27, 2020 · Updated Aug 5, 2024

Denial of service in Lustre before 2.12.3 allows remote attackers to crash the metadata server with a crafted MDT request. The mdt module accepts an oversized MDT Body eadatasize field without validating it against the packet's supplied field sizes, reaching an LBUG panic. Any client capable of sending MDT requests can stop metadata service, interrupting filesystem namespace operations until the server recovers.

CVSS severity7.5
High
EPSS probability2.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Lustre before 2.12.3 allows remote attackers to crash the metadata server with a crafted MDT request. The mdt module accepts an oversized MDT Body eadatasize field without validating it against the packet's supplied field sizes, reaching an LBUG panic. Any client capable of sending MDT requests can stop metadata service, interrupting filesystem namespace operations until the server recovers.

The record

CVE
CVE-2019-20430
Published
Jan 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-670, CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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 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-670Always-Incorrect Control Flow Implementation
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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