What is CVE-2020-5383?

CVE-2020-5383 is a medium-severity vulnerability in Dell EMC Isilon, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2020-08-27.

How severe is CVE-2020-5383?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Dell EMC Isilon

CVE-2020-5383

Dell EMC Isilon OneFS version 8.2.2 and Dell EMC PowerScale OneFS version 9.0.0 contains a buffer overflow vulnerability in the Likewise component. A remote unauthenticated malicious attacker may potentially exploit this vulnerability to cause a process restart.

Vulnerability class: Buffer Overflow

Published 2020-08-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (62.9th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Dell EMC Isilon — versions 8.2.2
Dell EMC Powerscale Onefs — versions 9.0.0
Dell Isilon Onefs — versions unspecified

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.dell.com/support/security/en-us/details/546005/DSA-2020-189-Dell-EMC-Isilon… (Vendor Advisory)

Frequently asked questions

What is CVE-2020-5383?: CVE-2020-5383 is a medium-severity vulnerability in Dell EMC Isilon, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2020-08-27.
How severe is CVE-2020-5383?: Medium severity. CVSS v3 base score is 5.3 out of 10.