{"id":"CVE-2020-27827","aliases":["ALPINE-CVE-2020-27827","ALSA-2024:9158","AZL-10443","CLSA-2025-1757692387","DEBIAN-CVE-2020-27827","DLA-2571-1","DLA-3389-1","DSA-4836-1","EUVD-2020-20326","GHSA-m3mq-x6x3-4537","OESA-2021-1179","RHSA-2021:0497","RHSA-2021:0834","RHSA-2021:0835","RHSA-2021:0837","RHSA-2021:0976","RHSA-2021:1050","RHSA-2021:1051","RHSA-2021:2077","RHSA-2021:2456","RHSA-2024:9158","RLSA-2024:9158","SUSE-SU-2021:0258-1","SUSE-SU-2021:0276-1","SUSE-SU-2021:0277-1","SUSE-SU-2021:0284-1","SUSE-SU-2021:0297-1","SUSE-SU-2021:0298-1","SUSE-SU-2021:0300-1","UBUNTU-CVE-2020-27827","USN-4691-1","openSUSE-SU-2021:0239-1","openSUSE-SU-2024:11024-1","openSUSE-SU-2024:11129-1"],"status":"published","title":"A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.03235,"percentile":0.88381,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2021-01-13T00:00:00Z","modified":"2026-11-03T06:32:25Z","fixes":[{"ecosystem":"Alpine:v3.12","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"lldpd","fixed_in":["1.0.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"openvswitch","fixed_in":["2.12.2-r0"],"sources":["osv"]},{"ecosystem":"Azure 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The highest threat from this vulnerability is to system availability.","status":"published","published":"2021-03-18T17:15:13Z","modified":"2026-04-21T04:21:16.308419Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:00.794214Z"},{"id":"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.","status":"published","published":"2021-03-18T17:15:13.51Z","modified":"2026-10-24T10:30:35.788824699Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"DEBIAN-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.","status":"published","published":"2021-03-18T17:15:13.51Z","modified":"2026-10-26T12:02:13.544734466Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:33.729655Z"},{"id":"OESA-2021-1179","title":"openvswitch security update","description":"Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license.\r\n\r\nSecurity Fix(es):\r\n\r\nA vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.(CVE-2020-35498)\r\n\r\nA 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.(CVE-2020-27827)\r\n\r\nBuffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.(CVE-2015-8011)","status":"published","published":"2021-05-06T11:04:25Z","modified":"2026-08-18T01:15:35.456908416Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"RHSA-2021:0497","title":"Red Hat Security Advisory: openvswitch2.13 security and bug fix update","status":"published","published":"2024-09-13T15:40:54Z","modified":"2026-08-07T10:02:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:0834","title":"Red Hat Security Advisory: openvswitch2.11 security update","status":"published","published":"2024-09-13T15:42:46Z","modified":"2026-08-07T10:02:23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:0835","title":"Red Hat Security Advisory: openvswitch2.13 security update","status":"published","published":"2024-09-13T15:43:00Z","modified":"2026-08-07T10:02:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:0837","title":"Red Hat Security Advisory: openvswitch2.11 security update","status":"published","published":"2024-09-13T15:42:53Z","modified":"2026-08-07T10:02:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:0976","title":"Red Hat Security Advisory: Red Hat Virtualization Host security, bug fix and enhancement update (4.4.4-2)","status":"published","published":"2024-09-13T15:43:15Z","modified":"2026-08-07T10:02:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1050","title":"Red Hat Security Advisory: openvswitch2.11 security update","status":"published","published":"2024-09-13T15:42:27Z","modified":"2026-08-07T10:02:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1051","title":"Red Hat Security Advisory: RHV-H enhancement and security update (redhat-virtualization-host) 4.3.14","status":"published","published":"2024-09-13T15:42:35Z","modified":"2026-08-07T10:02:28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:2077","title":"Red Hat Security Advisory: openvswitch security update","status":"published","published":"2024-09-13T15:43:17Z","modified":"2026-08-07T10:02:40Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:2456","title":"Red Hat Security Advisory: Red Hat OpenStack Platform 13.0 (openvswitch2.11) security update","status":"published","published":"2024-09-13T15:43:39Z","modified":"2026-08-07T10:02:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2024:9158","title":"Red Hat Security Advisory: lldpd security update","status":"published","published":"2024-11-15T07:39:57Z","modified":"2026-08-07T10:16:34Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:14.610978Z"},{"id":"UBUNTU-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.","status":"published","published":"2021-01-13T00:00:00Z","modified":"2026-10-21T10:15:35.199914808Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:24.541803Z"},{"id":"ALSA-2024:9158","title":"Moderate: lldpd security update","description":"LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.  \n\nSecurity Fix(es):  \n\n  * lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)\n  * lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)\n  * lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  \n\nAdditional Changes:  \n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.\n","status":"published","published":"2024-11-12T00:00:00Z","modified":"2026-10-29T11:31:51.958917501Z","updated_at":"2026-11-02T15:27:53.030731Z"},{"id":"CLSA-2025-1757692387","title":"lldpd: Fix of CVE-2020-27827","description":"- CVE-2020-27827: fix memory allocation issue caused by specially crafted LLDP\n  packets","status":"published","published":"2025-09-12T15:53:11Z","modified":"2026-06-01T00:31:05.270481065Z","updated_at":"2026-11-02T15:43:42.025438Z"},{"id":"DLA-2571-1","title":"openvswitch - security update","status":"published","published":"2021-02-19T00:00:00Z","modified":"2026-03-09T01:21:41.381821Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DLA-3389-1","title":"lldpd - security update","status":"published","published":"2023-04-10T00:00:00Z","modified":"2026-03-09T01:22:53.970132Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DSA-4836-1","title":"openvswitch - security update","status":"published","published":"2021-01-22T00:00:00Z","modified":"2026-03-09T02:08:51.172191Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"openSUSE-SU-2021:0239-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- openvswitch was updated to 2.13.2 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-02-05T15:13:49Z","modified":"2026-02-04T03:09:12.827509Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:11024-1","title":"liblldpctl4-1.0.12-1.2 on GA media","description":"These are all security issues fixed in the liblldpctl4-1.0.12-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:30:58.805469Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"openSUSE-SU-2024:11129-1","title":"libopenvswitch-2_14-0-2.14.2-11.3 on GA media","description":"These are all security issues fixed in the libopenvswitch-2_14-0-2.14.2-11.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:19:08.056351Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"RLSA-2024:9158","title":"Moderate: lldpd security update","description":"LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.\n\nSecurity Fix(es):\n\n* lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)\n\n* lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)\n\n* lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 9.5 Release Notes linked from the References section.","status":"published","published":"2025-03-17T20:16:49.937392Z","modified":"2026-02-05T07:30:11.672413Z","updated_at":"2026-11-02T15:53:24.923365Z"},{"id":"SUSE-SU-2021:0258-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- openvswitch was updated to 2.13.2 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\n","status":"published","published":"2021-02-01T13:46:57Z","modified":"2026-02-04T03:10:13.136Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0276-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- openvswitch was updated to 2.11.5 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\t  \t  \n","status":"published","published":"2021-02-02T07:46:11Z","modified":"2026-02-04T03:05:23.436333Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0277-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\t  \n- openvswitch was updated to 2.11.5 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\t  \n","status":"published","published":"2021-02-02T07:46:48Z","modified":"2026-02-04T02:30:21.153814Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0284-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\t  \n- openvswitch was updated to 2.7.12\n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\t  \nA lot more minor bugs have been fixed with this openvswitch version. Please refer to the changelog of\nthe openvswitch.rpm file in order to obtain a list of all changes.\n","status":"published","published":"2021-02-02T12:08:46Z","modified":"2026-02-04T02:31:20.265971Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0297-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\t  \n- openvswitch was updated to 2.8.10 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\nA lot more minor bugs have been fixed with this openvswitch version. Please refer to the changelog of\nthe openvswitch.rpm file in order to obtain a list of all changes.\n","status":"published","published":"2021-02-03T18:51:02Z","modified":"2026-02-04T03:32:10.325375Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0298-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\t  \n- openvswitch was updated to 2.5.11 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\t  \n- datapath: Clear the L4 portion of the key for 'later' fragments\n- datapath: Properly set L4 keys on 'later' IP fragments\n- ofproto-dpif: Fix using uninitialised memory in user_action_cookie.\n- stream-ssl: Fix crash on NULL private key and valid certificate.\n- datapath: fix flow actions reallocation\n","status":"published","published":"2021-02-03T18:51:10Z","modified":"2026-02-04T04:21:29.86832Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0300-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\t  \n- openvswitch was updated to 2.11.5 \n- CVE-2020-27827: Fixed a memory leak when parsing lldp packets (bsc#1181345)\t  \n","status":"published","published":"2021-02-03T18:53:09Z","modified":"2026-02-04T03:54:05.776066Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"USN-4691-1","title":"openvswitch vulnerabilities","description":"Jonas Rudloff discovered that Open vSwitch incorrectly handled certain\nmalformed LLDP packets. A remote attacker could use this issue to cause\nOpen vSwitch to crash, resulting in a denial of service, or possibly\nexecute arbitrary code.\n","status":"published","published":"2021-01-13T17:15:51Z","modified":"2026-04-27T16:03:35.704478328Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}