CVE-2019-20424Network attack vector

Metadata server panic via unchecked object pointer

Published Jan 27, 2020 · Updated Aug 5, 2024

NULL pointer dereference in Lustre before 2.12.3 allows remote attackers to panic a metadata server through a crafted client packet. mdt_object_remote fails to check whether its o argument is NULL before taking the address of o->mot_obj and passing it to lu_object_remote. Any unauthenticated client with network access to the metadata service can trigger the kernel panic, interrupting filesystem availability.

CVSS severity7.5
High
EPSS probability2.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Lustre before 2.12.3 allows remote attackers to panic a metadata server through a crafted client packet. mdt_object_remote fails to check whether its o argument is NULL before taking the address of o->mot_obj and passing it to lu_object_remote. Any unauthenticated client with network access to the metadata service can trigger the kernel panic, interrupting filesystem availability.

The record

CVE
CVE-2019-20424
Published
Jan 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
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

7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
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-476NULL Pointer Dereference
T1499Endpoint 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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