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Vulnerability record · CVE-2020-27827 · published 18 March 2021

CVE-2020-27827: Lldpd project lldpd uncontrolled resource consumption vulnerability

LLldpd Project · Lldpd

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

7.5 CVSS 3.1 High EPSS 3.2% · top 12.2% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score, v2 7.1
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

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

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1921438 Issue TrackingMitigationPatchThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HV
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJY
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html Mailing ListMitigationVendor Advisory
https://security.gentoo.org/glsa/202311-16
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 Third Party AdvisoryUS Government Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1921438 Issue TrackingMitigationPatchThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HV
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJY
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html Mailing ListMitigationVendor Advisory
https://security.gentoo.org/glsa/202311-16
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 Third Party AdvisoryUS Government Resource

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Source: NIST National Vulnerability Database (record CVE-2020-27827), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.