Is CVE-2020-35498 in the CISA KEV catalog?

No. CVE-2020-35498 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-35498?

CVE-2020-35498 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-35498?

CVE-2020-35498 has an EPSS score of 8.03% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-35498?

Upgrade openvswitch on debian 11 to 2.15.0~git20210104.def6eb1ea+dfsg1-5 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-35498

HIGHEPSS 94th pctl

7.5

CVSS v3

NVD

Description

A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

CWE-400Resource Exhaustion

How to fix

Remediation Available

openvswitchDebian

Fixed in:2.15.0~git20210104.def6eb1ea+dfsg1-5CVE-2020-35498

openvswitchUbuntu

Fixed in:2.5.9-0ubuntu0.16.04.3USN-4729-1

Fixed in:2.9.8-0ubuntu0.18.04.2USN-4729-1

Fixed in:2.13.1-0ubuntu0.20.04.4USN-4729-1

openvswitch-commonUbuntu

Fixed in:2.5.9-0ubuntu0.16.04.3USN-4729-1

Fixed in:2.9.8-0ubuntu0.18.04.2USN-4729-1

Fixed in:2.13.1-0ubuntu0.20.04.4USN-4729-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

8.03%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references2

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

Embed a live status badge for CVE-2020-35498

Markdown

[![CVE-2020-35498](https://tridentstack.com/cve/badge/CVE-2020-35498.svg)](https://tridentstack.com/cve/CVE-2020-35498)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-35498"><img src="https://tridentstack.com/cve/badge/CVE-2020-35498.svg" alt="CVE-2020-35498"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-23.