CVE-2019-20423

Name: CVE-2019-20423
Creator: NVD / NIST
Published: 2020-01-27T05:15:11.373+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.06%

Last modified Jun 17, 2026

CVE-2019-20423 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In the Lustre file system before 2.12.3, the ptlrpc module has a buffer overflow and panic due to the lack of validation for specific fields of packets sent by a client. The function target_handle_connect() mishandles a certain size value when a client connects to a server, because of an integer signedness error.. EPSS estimates a 2.06% chance of exploitation in the next 30 days.

Description

In the Lustre file system before 2.12.3, the ptlrpc module has a buffer overflow and panic due to the lack of validation for specific fields of packets sent by a client. The function target_handle_connect() mishandles a certain size value when a client connects to a server, because of an integer signedness error.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.06%

78.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Lustre	Lustre	< 2.12.3

References

http://lustre.org/Product, Vendor Advisory
http://wiki.lustre.org/Lustre_2.12.3_ChangelogRelease Notes, Vendor Advisory
https://jira.whamcloud.com/browse/LU-12605Exploit, Third Party Advisory
https://review.whamcloud.com/#/c/35935/Third Party Advisory
http://lustre.org/Product, Vendor Advisory
http://wiki.lustre.org/Lustre_2.12.3_ChangelogRelease Notes, Vendor Advisory
https://jira.whamcloud.com/browse/LU-12605Exploit, Third Party Advisory
https://review.whamcloud.com/#/c/35935/Third Party Advisory

Timeline

Published: Jan 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20423?

How severe is CVE-2019-20423?

CVE-2019-20423 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.06% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20423?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20423?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST