# CVE-2020-27827: openvswitch-common: A flaw was found in multiple versions of OpenvSwitch

CVE-2020-27827 is fixed in 18 products on 1 platform, first by openvswitch-common 2.9.7-0ubuntu0.18.04.2, released January 12, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-27827
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0324
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 12, 2021

## Description

A flaw was found in multiple versions of OpenvSwitch. Specially craftedLLDP packets can cause memory to be lost when allocating data to handlespecific optional TLVs, potentially causing a denial of service. Thehighest threat from this vulnerability is to system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lldpd RHEL 9 | 0:1.0.18-4.el9 | [RHSA-2024:9158](https://patchblox.com/security/data/fix/linux/rhsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd almalinux 9 | 1.0.18-4.el9 | [ALSA-2024:9158](https://patchblox.com/security/data/fix/linux/alsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd ol 9 | 0:1.0.18-4.el9 | [ELSA-2024-9158](https://patchblox.com/security/data/fix/linux/elsa-2024-9158.md) | Nov 14, 2024 |
| Linux | lldpd rocky 9 | 0:1.0.18-4.el9 | [RLSA-2024:9158](https://patchblox.com/security/data/fix/linux/rlsa-2024-9158.md) | Mar 17, 2025 |
| Linux | lldpd-devel RHEL 9 | 0:1.0.18-4.el9 | [RHSA-2024:9158](https://patchblox.com/security/data/fix/linux/rhsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd-devel almalinux 9 | 1.0.18-4.el9 | [ALSA-2024:9158](https://patchblox.com/security/data/fix/linux/alsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd-devel ol 9 | 0:1.0.18-4.el9 | [ELSA-2024-9158](https://patchblox.com/security/data/fix/linux/elsa-2024-9158.md) | Nov 14, 2024 |
| Linux | openvswitch-common Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-common 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-common-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-common Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-common 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-common-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-common Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-common 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-common-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-common Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-common 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-common-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-ipsec Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-ipsec 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-ipsec-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-ipsec Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-ipsec 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-ipsec-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-pki Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-pki 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-pki-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-pki Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-pki 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-pki-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-pki Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-pki 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-pki-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-pki Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-pki 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-pki-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-source Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-source 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-source-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-source Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-source 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-source-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-source Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-source 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-source-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-switch Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-switch 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-switch-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-switch Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-switch 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-switch-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-switch Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-switch 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-switch-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-switch Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-switch 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-switch-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-switch-dpdk Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-switch-dpdk 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-switch-dpdk-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-switch-dpdk Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-switch-dpdk 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-switch-dpdk-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-switch-dpdk Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-switch-dpdk 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-switch-dpdk-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-switch-dpdk Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-switch-dpdk 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-switch-dpdk-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-test Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-test 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-test-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-test Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-test 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-test-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-test Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-test 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-test-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-test Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-test 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-test-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-testcontroller Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-testcontroller 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-testcontroller-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-testcontroller Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-testcontroller 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-testcontroller-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-testcontroller Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-testcontroller 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-testcontroller-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-testcontroller Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-testcontroller 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-testcontroller-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-vtep Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [openvswitch-vtep 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openvswitch-vtep-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | openvswitch-vtep Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [openvswitch-vtep 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openvswitch-vtep-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | openvswitch-vtep Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [openvswitch-vtep 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openvswitch-vtep-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | openvswitch-vtep Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [openvswitch-vtep 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openvswitch-vtep-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | ovn-central Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [ovn-central 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ovn-central-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | ovn-common Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [ovn-common 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ovn-common-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | ovn-controller-vtep Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [ovn-controller-vtep 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ovn-controller-vtep-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | ovn-docker Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [ovn-docker 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ovn-docker-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | ovn-host Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [ovn-host 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ovn-host-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | python-openvswitch Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [python-openvswitch 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-openvswitch-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | python3-openvswitch Ubuntu 18.04.6 LTS (bionic) | 2.9.7-0ubuntu0.18.04.2 | [python3-openvswitch 2.9.7-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-openvswitch-2.9.7-0ubuntu0.18.04.2.md) | Jan 12, 2021 |
| Linux | python3-openvswitch Ubuntu 20.04 LTS (focal) | 2.13.1-0ubuntu0.20.04.3 | [python3-openvswitch 2.13.1-0ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-openvswitch-2.13.1-0ubuntu0.20.04.3.md) | Jan 12, 2021 |
| Linux | python3-openvswitch Ubuntu 24.10 (oracular) | 2.15.0-0ubuntu1 | [python3-openvswitch 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-openvswitch-2.15.0-0ubuntu1.md) | Jan 13, 2021 |
| Linux | python3-openvswitch Ubuntu 25.04 (plucky) | 2.15.0-0ubuntu1 | [python3-openvswitch 2.15.0-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-openvswitch-2.15.0-0ubuntu1.md) | Jan 13, 2021 |

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