Vulnerability DatabaseCVE-2020-35498
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CVE-2020-35498
Published:February 11, 2021
Updated:July 21, 2026
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.
Related Resources (10)
https://security.gentoo.org/glsa/202311-16
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR/
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-35498
https://www.openwall.com/lists/oss-security/2021/02/10/4
https://bugzilla.redhat.com/show_bug.cgi?id=1908845
https://security-tracker.debian.org/tracker/CVE-2020-35498
https://security.alpinelinux.org/vuln/CVE-2020-35498
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR/
https://www.debian.org/security/2021/dsa-4852
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Resource Consumption
CWE-400
EPSS
Base Score:
8.03