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CVE-2019-25076

The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote...

5.8 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

2.41%Up 1.3 points since Sep 9, 2022
90%50%10%1%

What each source reports

NVD Score used 5.8

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.

Record
CVE-2019-25076
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-25076
Updated
2026-11-02
EUVDEUVD-2019-11518 No score

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.

Record
EUVD-2019-11518
Updated
2026-11-03
GitHub AdvisoriesGHSA-8ch8-jcmf-3gj4 5.8

The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote...

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.

Record
GHSA-8ch8-jcmf-3gj4
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSVAZL-10905 5.8

CVE-2019-25076 affecting package openvswitch for versions less than 2.17.5-1

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.

Record
AZL-10905
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSV 5.8

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.

Record
CVE-2019-25076
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSVDEBIAN-CVE-2019-25076 5.8

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.

Record
DEBIAN-CVE-2019-25076
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2019-25076 5.8

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.

Record
UBUNTU-CVE-2019-25076
CVSS 3.1
5.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openvswitch
Azure Linux:2
 before 2.17.5-1
2.17.5-1
openvswitch
Debian:12
 All versions, plus listed versions
3.1.0-23.1.0-2+deb12u13.1.2-13.1.2-23.1.2-3
Show 33 moreShow less
3.1.2-43.2.0-13.2.0-23.2.2~git20231029-13.2.2~git20231029-23.3.0-13.3.0-23.3.0-33.3.0-43.3.0-53.3.0~git20240118.e802fe7-13.3.0~git20240118.e802fe7-23.3.0~git20240118.e802fe7-33.3.1-13.4.0-13.5.0-13.5.0~git20241129.2af7cef-13.5.0~git20241129.2af7cef-23.6.0-13.6.0-23.6.0-33.6.0-53.6.0-63.6.0-73.7.0-13.7.0~git20260211.8c6ebf8-1~1.gbp9127d13.7.0~git20260211.8c6ebf8-1~1.gbp9127d23.7.0~git20260211.8c6ebf8-1~1.gbp9127d33.7.1-13.7.1-23.7.1-34.0.0-14.0.0-2
 None known
openvswitch
Debian:13
 All versions, plus listed versions
3.5.0-13.6.0-13.6.0-23.6.0-33.6.0-5
Show 11 moreShow less
3.6.0-63.6.0-73.7.0-13.7.0~git20260211.8c6ebf8-1~1.gbp9127d13.7.0~git20260211.8c6ebf8-1~1.gbp9127d23.7.0~git20260211.8c6ebf8-1~1.gbp9127d33.7.1-13.7.1-23.7.1-34.0.0-14.0.0-2
 None known
openvswitch
Debian:14
 All versions, plus listed versions
3.5.0-13.6.0-13.6.0-23.6.0-33.6.0-5
Show 11 moreShow less
3.6.0-63.6.0-73.7.0-13.7.0~git20260211.8c6ebf8-1~1.gbp9127d13.7.0~git20260211.8c6ebf8-1~1.gbp9127d23.7.0~git20260211.8c6ebf8-1~1.gbp9127d33.7.1-13.7.1-23.7.1-34.0.0-14.0.0-2
 None known
openvswitch
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2.4.0-0ubuntu42.4.0-0ubuntu52.5.0~git20160129.46a88d9-0ubuntu12.5.0~git20160219.522aca6-0ubuntu12.5.0~git20160219.522aca6-0ubuntu2
Show 11 moreShow less
2.5.0~git20160219.522aca6-0ubuntu32.5.0-0ubuntu12.5.2-0ubuntu0.16.04.12.5.2-0ubuntu0.16.04.22.5.2-0ubuntu0.16.04.32.5.4-0ubuntu0.16.04.12.5.5-0ubuntu0.16.04.12.5.5-0ubuntu0.16.04.22.5.9-0ubuntu0.16.04.22.5.9-0ubuntu0.16.04.32.5.9-0ubuntu0.16.04.3+esm1
 None known
openvswitch
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2.8.0-0ubuntu22.8.1-0ubuntu22.8.1-0ubuntu32.9.0~git20180205.5a39582ca-0ubuntu12.9.0-0ubuntu1
Show 9 moreShow less
2.9.2-0ubuntu0.18.04.22.9.2-0ubuntu0.18.04.32.9.5-0ubuntu0.18.04.12.9.7-0ubuntu0.18.04.22.9.8-0ubuntu0.18.04.22.9.8-0ubuntu0.18.04.32.9.8-0ubuntu0.18.04.42.9.8-0ubuntu0.18.04.52.9.8-0ubuntu0.18.04.5+esm1
 None known
openvswitch
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.12.0-0ubuntu12.12.0-0ubuntu22.12.1~git20191107.7accd1302-0ubuntu12.12.90~git20200107.af683565b-0ubuntu12.12.90~git20200107.af683565b-0ubuntu2
Show 16 moreShow less
2.12.90~git20200107.af683565b-0ubuntu32.13.0~git20200127.dbdf66c29-0ubuntu22.13.0~git20200212.15ae9db33-0ubuntu12.13.0~git20200212.15ae9db33-0ubuntu22.13.0-0ubuntu12.13.1-0ubuntu0.20.04.12.13.1-0ubuntu0.20.04.32.13.1-0ubuntu0.20.04.42.13.3-0ubuntu0.20.04.12.13.3-0ubuntu0.20.04.22.13.5-0ubuntu12.13.8-0ubuntu12.13.8-0ubuntu1.12.13.8-0ubuntu1.22.13.8-0ubuntu1.32.13.8-0ubuntu1.4
 None known
openvswitch
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.16.0-0ubuntu22.16.0-0ubuntu32.16.0-0ubuntu42.17.0~git20220105.0d1ffb7-0ubuntu12.17.0~git20220118.1b9fd88-0ubuntu1
Show 12 moreShow less
2.17.0~git20220121.109d024-0ubuntu12.17.0-0ubuntu12.17.2-0ubuntu0.22.04.12.17.2-0ubuntu0.22.04.22.17.3-0ubuntu0.22.04.12.17.3-0ubuntu0.22.04.22.17.5-0ubuntu0.22.04.22.17.7-0ubuntu0.22.04.12.17.8-0ubuntu0.22.04.12.17.9-0ubuntu0.22.04.12.17.9-0ubuntu0.22.04.22.17.12-0ubuntu0.22.04.1
 None known
openvswitch
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.2.0-13.2.0-23.2.0-2build13.2.2~git20231029-23.2.2~git20231029-2build1
Show 11 moreShow less
3.3.0~git20240118.e802fe7-23.3.0~git20240118.e802fe7-33.3.0-13.3.0-1build13.3.0-1ubuntu13.3.0-1ubuntu33.3.0-1ubuntu3.13.3.0-1ubuntu3.23.3.4-0ubuntu0.24.04.13.3.4-0ubuntu0.24.04.23.3.9-0ubuntu0.24.04.1
 None known
openvswitch
Ubuntu:25.10
 All versions, plus listed versions
3.5.0-1build13.5.1-0ubuntu13.6.0-13.6.0-23.6.0-2ubuntu0.1
 None known
openvswitch
Ubuntu:26.10
 All versions, plus listed versions
3.7.1-23.7.1-33.7.1-3build14.0.0-1
 None known
openvswitch
Ubuntu:26.04:LTS
 All versions, plus listed versions
3.6.0-23.6.0-2build13.6.0-53.6.0-63.6.0-6build1
Show 6 moreShow less
3.6.0-6ubuntu23.7.0~git20260211.8c6ebf8-1~1.gbp9127d13.7.0-13.7.0-1build13.7.1-13.7.1-2
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-25076 is a medium vulnerability (CVSS 5.8) in Openvswitch, published September 8, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.41%, the 84th percentile. Fixed in openvswitch 2.17.5-1.

References

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