{"id":"CVE-2020-35498","aliases":["ALPINE-CVE-2020-35498","DEBIAN-CVE-2020-35498","DLA-2571-1","DSA-4852-1","EUVD-2020-23167","GHSA-9978-p96m-85pj","OESA-2021-1179","RHSA-2021:0497","RHSA-2021:0834","RHSA-2021:0835","RHSA-2021:0837","RHSA-2021:1050","RHSA-2021:2077","RHSA-2021:2456","SUSE-SU-2021:0436-1","SUSE-SU-2021:0439-1","SUSE-SU-2021:0440-1","SUSE-SU-2021:0446-1","SUSE-SU-2021:0451-1","SUSE-SU-2021:0479-1","SUSE-SU-2022:3384-1","UBUNTU-CVE-2020-35498","USN-4729-1","openSUSE-SU-2021:0283-1"],"status":"published","title":"A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet...","description":"A 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. 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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":"2026-11-09","score":0.08026,"percentile":0.94814,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-400"],"published":"2021-02-10T00:00:00Z","modified":"2026-11-03T06:32:25Z","exploits":[{"source":"pocgithub","id":"freddierice/cve-2020-35498-flag","title":"freddierice/cve-2020-35498-flag","date":"2021-02-12","url":"https://github.com/freddierice/cve-2020-35498-flag"}],"fixes":[{"ecosystem":"Alpine:v3.13","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"openvswitch","fixed_in":["2.12.3-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"openvswitch","fixed_in":["2.15.0~git20210104.def6eb1ea+dfsg1-5"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openvswitch","fixed_in":["2.15.0~git20210104.def6eb1ea+dfsg1-5"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openvswitch","fixed_in":["2.15.0~git20210104.def6eb1ea+dfsg1-5"],"sources":["osv"]},{"ecosystem":"Debian:10","package":"openvswitch","fixed_in":["2.10.7+ds1-0+deb10u1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux 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The highest threat from this vulnerability is to system availability.","status":"published","published":"2021-02-11T18:15:15.677Z","modified":"2026-06-17T03:13:48.957Z","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","assessor":"primary"},{"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":"secondary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:34.188486Z"}],"osv":[{"id":"ALPINE-CVE-2020-35498","description":"A 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.","status":"published","published":"2021-02-11T18:15:15.677Z","modified":"2026-11-03T06:32:25.775857367Z","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":"2026-11-03T07:17:57.723967Z"},{"id":"CVE-2020-35498","description":"A 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.","status":"published","published":"2021-02-11T18:15:15.677Z","modified":"2026-10-24T10:31:00.208118427Z","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":"2026-11-02T15:44:16.612899Z"},{"id":"DEBIAN-CVE-2020-35498","description":"A 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.","status":"published","published":"2021-02-11T18:15:15.677Z","modified":"2026-10-26T12:02:00.35478458Z","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":"2026-11-02T15:45:34.019707Z"},{"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-2021:1050","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-2021:2077","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":"UBUNTU-CVE-2020-35498","description":"A 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.","status":"published","published":"2021-02-10T00:00:00Z","modified":"2026-02-04T02:27:37.673464Z","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":"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":"DSA-4852-1","title":"openvswitch - security update","status":"published","published":"2021-02-15T00:00:00Z","modified":"2026-03-09T02:11:13.715093Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"openSUSE-SU-2021:0283-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-02-13T12:02:39Z","modified":"2026-02-04T04:17:52.742005Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"SUSE-SU-2021:0436-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-11T15:33:29Z","modified":"2026-02-04T04:07:19.159602Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0439-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-11T15:34:44Z","modified":"2025-05-02T04:30:49.602644Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0440-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-11T15:35:02Z","modified":"2026-02-04T04:38:02.724094Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0446-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-12T10:25:24Z","modified":"2026-02-04T02:42:16.434478Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0451-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-12T12:49:07Z","modified":"2026-02-04T02:57:34.229843Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0479-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed a denial of service related to the handling of Ethernet padding (bsc#1181742).\n","status":"published","published":"2021-02-15T09:58:41Z","modified":"2026-02-04T03:51:17.272313Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2022:3384-1","title":"Security update for openvswitch","description":"This update for openvswitch fixes the following issues:\n\n- CVE-2020-35498: Fixed packet parsing vulnerability (bsc#1181742).\n","status":"published","published":"2022-09-26T10:34:40Z","modified":"2026-02-04T02:57:14.827833Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"USN-4729-1","title":"openvswitch vulnerability","description":"Joakim Hindersson discovered that Open vSwitch incorrectly parsed certain\nnetwork packets. A remote attacker could use this issue to cause a denial\nof service, or possibly alter packet classification.\n","status":"published","published":"2021-02-10T15:21:32Z","modified":"2026-02-10T04:42:03Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}