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CVE-2020-35498

HIGH
7.5
CVSS Score
Published: February 11, 2021 at 12:00 AM UTC
Updated: June 17, 2026 at 03:13 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraOpenvswitch

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Severity
HIGH7.5
Exploit prediction
EPSS 8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.09.0
Fedora· Fedora Projectrpm
95%
33
Openvswitch· Openvswitch
95%
2.10.0 ≤ v < 2.10.72.11.0 ≤ v < 2.11.62.12.0 ≤ v < 2.12.32.13.0 ≤ v < 2.13.32.14.0 ≤ v < 2.14.22.5.0 ≤ v < 2.5.122.6.0 ≤ v < 2.6.102.7.0 ≤ v < 2.7.132.8.0 ≤ v < 2.8.112.9.0 ≤ v < 2.9.92.10.72.11.62.12.32.13.32.14.22.5.122.6.102.7.132.8.112.9.9
Affected range stops below 2.10.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.11.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.12.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.13.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.14.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.5.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.6.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.8.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.9.9, so it looks safe — our inference, not a vendor statement

References (6)

Issue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1908845
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR/
Vendor Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202311-16
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4852
Mailing ListPatchThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2021/02/10/4

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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