What is CVE-2020-35139?

CVE-2020-35139 is a high-severity vulnerability in Faucet Ryu, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2023-08-11.

How severe is CVE-2020-35139?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Faucet Ryu

CVE-2020-35139

An issue was discovered in OFPBundleCtrlMsg in parser.py in Faucet SDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).

Published 2023-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (59.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% 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

Faucet Ryu — versions 4.34

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/faucetsdn/ryu/issues/118 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2020-35139?: CVE-2020-35139 is a high-severity vulnerability in Faucet Ryu, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2023-08-11.
How severe is CVE-2020-35139?: High severity. CVSS v3 base score is 7.5 out of 10.