UBUNTU-CVE-2026-36499

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Source

https://ubuntu.com/security/CVE-2026-36499

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-36499

Upstream

CVE-2026-36499

Published

2026-06-04T19:16:00Z

Modified

2026-06-12T09:04:11.048270920Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A missing upper-bound check in the udpifsetthreads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.

References

Affected packages

Ubuntu:20.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.12.0-0ubuntu1

2.12.0-0ubuntu2

2.12.1~git20191107.7accd1302-0ubuntu1

2.12.90~git20200107.af683565b-0ubuntu1

2.12.90~git20200107.af683565b-0ubuntu2

2.12.90~git20200107.af683565b-0ubuntu3

2.13.0~git20200127.dbdf66c29-0ubuntu2

2.13.0~git20200212.15ae9db33-0ubuntu1

2.13.0~git20200212.15ae9db33-0ubuntu2

2.13.0-0ubuntu1

2.13.1-0ubuntu0.20.04.1

2.13.1-0ubuntu0.20.04.3

2.13.1-0ubuntu0.20.04.4

2.13.3-0ubuntu0.20.04.1

2.13.3-0ubuntu0.20.04.2

2.13.5-0ubuntu1

2.13.8-0ubuntu1

2.13.8-0ubuntu1.1

2.13.8-0ubuntu1.2

2.13.8-0ubuntu1.3

2.13.8-0ubuntu1.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-source"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "2.13.8-0ubuntu1.4",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:22.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.16.0-0ubuntu2

2.16.0-0ubuntu3

2.16.0-0ubuntu4

2.17.0~git20220105.0d1ffb7-0ubuntu1

2.17.0~git20220118.1b9fd88-0ubuntu1

2.17.0~git20220121.109d024-0ubuntu1

2.17.0-0ubuntu1

2.17.2-0ubuntu0.22.04.1

2.17.2-0ubuntu0.22.04.2

2.17.3-0ubuntu0.22.04.1

2.17.3-0ubuntu0.22.04.2

2.17.5-0ubuntu0.22.04.2

2.17.7-0ubuntu0.22.04.1

2.17.8-0ubuntu0.22.04.1

2.17.9-0ubuntu0.22.04.1

2.17.9-0ubuntu0.22.04.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-ipsec"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-source"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "2.17.9-0ubuntu0.22.04.2",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:24.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.0-1

3.2.0-2

3.2.0-2build1

3.2.2~git20231029-2

3.2.2~git20231029-2build1

3.3.0~git20240118.e802fe7-2

3.3.0~git20240118.e802fe7-3

3.3.0-1

3.3.0-1build1

3.3.0-1ubuntu1

3.3.0-1ubuntu3

3.3.0-1ubuntu3.1

3.3.0-1ubuntu3.2

3.3.4-0ubuntu0.24.04.1

3.3.4-0ubuntu0.24.04.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-ipsec"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-source"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "3.3.4-0ubuntu0.24.04.2",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:25.10

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.5.0-1build1

3.5.1-0ubuntu1

3.6.0-1

3.6.0-2

3.6.0-2ubuntu0.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-ipsec"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-source"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "3.6.0-2ubuntu0.1",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:26.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.6.0-2

3.6.0-2build1

3.6.0-5

3.6.0-6

3.6.0-6build1

3.6.0-6ubuntu2

3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1

3.7.0-1

3.7.0-1build1

3.7.1-1

3.7.1-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-ipsec"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-source"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "3.7.1-2",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:Pro:16.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.4.0-0ubuntu4

2.4.0-0ubuntu5

2.5.0~git20160129.46a88d9-0ubuntu1

2.5.0~git20160219.522aca6-0ubuntu1

2.5.0~git20160219.522aca6-0ubuntu2

2.5.0~git20160219.522aca6-0ubuntu3

2.5.0-0ubuntu1

2.5.2-0ubuntu0.16.04.1

2.5.2-0ubuntu0.16.04.2

2.5.2-0ubuntu0.16.04.3

2.5.4-0ubuntu0.16.04.1

2.5.5-0ubuntu0.16.04.1

2.5.5-0ubuntu0.16.04.2

2.5.9-0ubuntu0.16.04.2

2.5.9-0ubuntu0.16.04.3

2.5.9-0ubuntu0.16.04.3+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-ipsec"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "ovn-central"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "ovn-common"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "ovn-docker"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "ovn-host"
        },
        {
            "binary_version": "2.5.9-0ubuntu0.16.04.3+esm1",
            "binary_name": "python-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"

Ubuntu:Pro:18.04:LTS

openvswitch

Package

Name: openvswitch
Purl: pkg:deb/ubuntu/openvswitch?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.8.0-0ubuntu2

2.8.1-0ubuntu2

2.8.1-0ubuntu3

2.9.0~git20180205.5a39582ca-0ubuntu1

2.9.0-0ubuntu1

2.9.2-0ubuntu0.18.04.2

2.9.2-0ubuntu0.18.04.3

2.9.5-0ubuntu0.18.04.1

2.9.7-0ubuntu0.18.04.2

2.9.8-0ubuntu0.18.04.2

2.9.8-0ubuntu0.18.04.3

2.9.8-0ubuntu0.18.04.4

2.9.8-0ubuntu0.18.04.5

2.9.8-0ubuntu0.18.04.5+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-common"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-pki"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-switch"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-switch-dpdk"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-test"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-testcontroller"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "openvswitch-vtep"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "ovn-central"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "ovn-common"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "ovn-controller-vtep"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "ovn-docker"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "ovn-host"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "python-openvswitch"
        },
        {
            "binary_version": "2.9.8-0ubuntu0.18.04.5+esm1",
            "binary_name": "python3-openvswitch"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-36499.json"