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Vulnerability record · CVE-2019-25076 · published 8 September 2022

CVE-2019-25076: Openvswitch vulnerability

Openvswitch · Openvswitch

The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka a Tuple Space Explosion (TSE) attack.

5.8 CVSS 3.1 Medium EPSS 2.3% · top 17.1%
5.8CVSS 3.1 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka a Tuple Space Explosion (TSE) attack.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://arxiv.org/abs/2011.09107 Third Party Advisory
https://dl.acm.org/citation.cfm?doid=3359989.3365431 Third Party Advisory
https://sites.google.com/view/tuple-space-explosion ExploitThird Party Advisory
https://www.youtube.com/watch?v=5cHpzVK0D28 ExploitThird Party Advisory
https://www.youtube.com/watch?v=DSC3m-Bww64 ExploitThird Party Advisory
https://arxiv.org/abs/2011.09107 Third Party Advisory
https://dl.acm.org/citation.cfm?doid=3359989.3365431 Third Party Advisory
https://sites.google.com/view/tuple-space-explosion ExploitThird Party Advisory
https://www.youtube.com/watch?v=5cHpzVK0D28 ExploitThird Party Advisory
https://www.youtube.com/watch?v=DSC3m-Bww64 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-25076), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.