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…

published 2020-01-27 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-10975

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 5.1%; EPSS 5.1% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

lustre lustre 2.12.3

Exploit prediction

5.10% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

jira.whamcloud.com https://jira.whamcloud.com/browse/LU-12600 referenced PoC, tagged "exploit" by a source, unverified
review.whamcloud.com https://review.whamcloud.com/#/c/35867/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:N/C:P/I:P/A:C

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

jira.whamcloud.com /browse/LU-12600
exploit, issue-tracking, third-party-advisory
review.whamcloud.com /#/c/35867/
exploit, third-party-advisory
wiki.lustre.org /Lustre_2.12.3_Changelog
release-notes, vendor-advisory
lustre.org /
product, vendor-advisory

Sources

CVE List CVE-2019-20427
NVD CVE-2019-20427

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary