CVE-2019-20425Network attack vector

Server panic via unchecked packet field length

Published Jan 27, 2020 · Updated Aug 5, 2024

Out-of-bounds access in Lustre before 2.12.3 allows remote attackers to panic a server with a malformed client packet. In ptlrpc message parsing, lustre_msg_string trusts a length returned by lustre_msg_buflen_v2 without validating that the named buffer contains that many bytes, causing access beyond the packet boundary. Network access as a Lustre client is sufficient; the documented consequence is a kernel panic and resulting service interruption, not data disclosure or modification.

CVSS severity7.5
High
EPSS probability1.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Lustre before 2.12.3 allows remote attackers to panic a server with a malformed client packet. In ptlrpc message parsing, lustre_msg_string trusts a length returned by lustre_msg_buflen_v2 without validating that the named buffer contains that many bytes, causing access beyond the packet boundary. Network access as a Lustre client is sufficient; the documented consequence is a kernel panic and resulting service interruption, not data disclosure or modification.

The record

CVE
CVE-2019-20425
Published
Jan 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, 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

7.5NIST 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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