High severity7.5NVD Advisory· Published Mar 18, 2021· Updated Jun 17, 2026

CVE-2020-27827

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

OpenvSwitch/OpenvSwitchdescription
osv-coords40 versions
pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/openvswitch&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/openvswitch&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/openvswitch&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/openvswitch-dpdk&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/openvswitch-dpdk&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/openvswitch-dpdk&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/openvswitch&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/openvswitch&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/openvswitch&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/openvswitch&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/opensuse/openvswitch&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP2 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/openvswitch&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20Enterprise%20Storage%205 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/openvswitch&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/openvswitch-dpdk&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/openvswitch&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/almalinux/lldpd pkg:rpm/almalinux/lldpd-devel pkg:rpm/opensuse/openvswitch&distro=openSUSE%20Tumbleweed pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2 pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL
< 2.11.5-3.3.2+ 39 more
- (no CPE)range: < 2.11.5-3.3.2
- (no CPE)range: < 2.11.5-6.30.2
- (no CPE)range: < 2.11.5-6.30.2
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.8.10-4.23.1
- (no CPE)range: < 2.8.10-4.23.1
- (no CPE)range: < 2.8.10-4.23.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.11.5-3.12.1
- (no CPE)range: < 2.13.2-lp152.3.9.1
- (no CPE)range: < 2.13.2-9.11.1
- (no CPE)range: < 2.11.5-3.3.2
- (no CPE)range: < 2.11.5-6.30.2
- (no CPE)range: < 2.11.5-6.30.2
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 2.8.10-4.23.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.5.11-25.26.1
- (no CPE)range: < 2.7.12-3.36.1
- (no CPE)range: < 1.0.18-4.el9
- (no CPE)range: < 1.0.18-4.el9
- (no CPE)range: < 2.14.2-11.3
- (no CPE)range: < 2.13.2-9.11.1
- (no CPE)range: < 2.11.5-3.12.1
Openvswitch/Openvswitchllm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*range: >=2.6.0,<2.6.9
lldpd/lldpd
cpe:2.3:a:lldpd_project:lldpd:*:*:*:*:*:*:*:*
Range: <1.0.8
Red Hat/Openshift Container Platform
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
Red Hat/Openstack2 versions
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
Red Hat/Virtualization
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server2 versions
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
Fedoraproject/Fedora
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Siemens Foundation/Simatic Hmi Unified Comfort Panels Firmware
cpe:2.3:o:siemens:simatic_hmi_unified_comfort_panels_firmware:*:*:*:*:*:*:*:*
Range: <17
Siemens Foundation/Simatic Net Cp 1243 1 Firmware
cpe:2.3:o:siemens:simatic_net_cp_1243-1_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1243 8 Irc Firmware
cpe:2.3:o:siemens:simatic_net_cp_1243-8_irc_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1542sp 1 Firmware
cpe:2.3:o:siemens:simatic_net_cp_1542sp-1_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1542sp 1 Irc Firmware
cpe:2.3:o:siemens:simatic_net_cp_1542sp-1_irc_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1543 1 Firmware
cpe:2.3:o:siemens:simatic_net_cp_1543-1_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1543sp 1 Firmware
cpe:2.3:o:siemens:simatic_net_cp_1543sp-1_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Simatic Net Cp 1545 1 Firmware
cpe:2.3:o:siemens:simatic_net_cp_1545-1_firmware:-:*:*:*:*:*:*:*
Siemens Foundation/Tim 1531 Irc Firmware
cpe:2.3:o:siemens:tim_1531_irc_firmware:*:*:*:*:*:*:*:*
Range: <2.2
Siemens Foundation/Sinumerik One Firmware
cpe:2.3:o:siemens:sinumerik_one_firmware:*:*:*:*:*:*:*:*
Range: <2.0.1

Patches

Vulnerability mechanics

References

bugzilla.redhat.com/show_bug.cginvdIssue TrackingMitigationPatchThird Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-941426.pdfnvdPatchThird Party Advisory
mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.htmlnvdMailing ListMitigationVendor Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-194-07nvdThird Party AdvisoryUS Government Resource
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/nvd
security.gentoo.org/glsa/202311-16nvd

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.003
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000