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No exploitation reportedFix available

CVE-2019-25076

No exploitation reported by the sources we read.

  • Published2022-09-08

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-09-0823:15CVE publishedNVD

Versions per branch

NVD
Openvswitch
BranchAffectedFixed in
2.x≥ 2.0.0, ≤ 2.17.2no fix published
3.0= 3.0.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openvswitchUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:26.10all versions · no fixed version listed
  • openvswitchUbuntu:26.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:25.10all versions · no fixed version listed
  • openvswitchUbuntu:24.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:22.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:20.04:LTSall versions · no fixed version listed

4 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-25076 Red Hat Product Security125 known affected

    openvswitch: DoS via crafted packet

    openvswitch as a component of Fast Datapath for RHEL 7 · openvswitch-devel as a component of Fast Datapath for RHEL 7 · openvswitch-ovn-central as a component of Fast Datapath for RHEL 7 · +122 more

Full record on NVD

Fix

  1. No fix available, says the vendor Red Hat Product Security CVE-2019-25076 · 7 productsAffected
  2. No fix planned, says the vendor Red Hat Product Security CVE-2019-25076 · 88 productsOut of support scope
  3. No fix planned, says the vendor Red Hat Product Security CVE-2019-25076 · 30 productsWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Published
2022-09-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8ch8-jcmf-3gj4

Frequently asked questions

What is CVE-2019-25076?

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.

Is CVE-2019-25076 actively exploited?

Active exploitation of CVE-2019-25076 has not been confirmed. Its EPSS score was 2.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-25076?

CVE-2019-25076 has a CVSS v3 base score of 5.8 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

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Sources for this record