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    CVE-2020-27827

    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.

    Published:Jan 13, 2021
    Last Modified:Dec 3, 2025
    EPS:Mar 18, 2021
    EPSS Score:0.00415
    CVSS Score:7.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Lldpd Project
    Product
    Lldpd
    Vendor
    Openvswitch
    Product
    Openvswitch
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openshift Container Platform
    Vendor
    Redhat
    Product
    Openstack
    Vendor
    Redhat
    Product
    Rhev Hypervisor
    Vendor
    Redhat
    Product
    Virtualization
    Vendor
    Siemens
    Product
    Simatic Hmi Unified Comfort Panels
    Vendor
    Siemens
    Product
    Simatic Hmi Unified Comfort Panels Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-8 Irc
    Vendor
    Siemens
    Product
    Simatic Net Cp 1243-8 Irc Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Irc
    Vendor
    Siemens
    Product
    Simatic Net Cp 1542sp-1 Irc Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543sp-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1543sp-1 Firmware
    Vendor
    Siemens
    Product
    Simatic Net Cp 1545-1
    Vendor
    Siemens
    Product
    Simatic Net Cp 1545-1 Firmware
    Vendor
    Siemens
    Product
    Sinumerik One
    Vendor
    Siemens
    Product
    Sinumerik One Firmware
    Vendor
    Siemens
    Product
    Tim 1531 Irc
    Vendor
    Siemens
    Product
    Tim 1531 Irc Firmware

    Exploits

    No exploit reference

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    References

    https://bugzilla.redhat.com/show_bug.cgi?id=1921438
    https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
    https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
    https://security.gentoo.org/glsa/202311-16
    https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
    https://bugzilla.redhat.com/show_bug.cgi?id=1921438
    https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
    https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
    https://security.gentoo.org/glsa/202311-16
    https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High