CVE-2019-20427

Name: CVE-2019-20427
Creator: NVD / NIST
Published: 2020-01-27T05:15:12.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.90%

Last modified Jun 17, 2026

CVE-2019-20427 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In the Lustre file system before 2.12.3, the ptlrpc module has a buffer overflow and panic, and possibly remote code execution, due to the lack of validation for specific fields of packets sent by a client. Interaction between req_capsule_get_size and tgt_brw_write leads to a tgt_shortio2pages integer signedness error.. EPSS estimates a 4.90% 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, and possibly remote code execution, due to the lack of validation for specific fields of packets sent by a client. Interaction between req_capsule_get_size and tgt_brw_write leads to a tgt_shortio2pages integer signedness error.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.90%

91.0th 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-12600Exploit, Issue Tracking, Third Party Advisory
https://review.whamcloud.com/#/c/35867/Exploit, 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-12600Exploit, Issue Tracking, Third Party Advisory
https://review.whamcloud.com/#/c/35867/Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-20427?

How severe is CVE-2019-20427?

CVE-2019-20427 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.90% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20427?

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-2019-20427?

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

Scan your code now

Source: NVD / NIST