CVE-2020-35498

openvswitch: limitation in the OVS packet parsing in userspace leads to DoS

Published Feb 11, 2021 CVSS 3.1 · 7.5 High EPSS 8.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2571-1 openvswitch security update
Debian DSA Debian DSA DSA-4852-1 openvswitch security update
EUVD EUVD EUVD-2020-23167 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.
Ubuntu USN Ubuntu USN USN-4729-1 Open vSwitch vulnerability
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Apr 23, 2025, 7:46 PM
Reserved
Dec 17, 2020, 12:00 AM
Status
Modified
Published
Feb 11, 2021, 6:15 PM
Modified
Jun 17, 2026, 3:13 AM
Severity
Important
Public date
Feb 10, 2021, 12:00 AM