{"id":"CVE-2026-36499","aliases":["DEBIAN-CVE-2026-36499","EUVD-2026-34317","GHSA-87x4-f37w-27p2","UBUNTU-CVE-2026-36499"],"status":"published","title":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an...","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00328,"percentile":0.26217,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2026-06-04T00:00:00Z","modified":"2026-10-17T12:58:13Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.0-2","3.1.0-2+deb12u1","3.1.2-1","3.1.2-2","3.1.2-3","3.1.2-4","3.2.0-1","3.2.0-2","3.2.2~git20231029-1","3.2.2~git20231029-2","3.3.0-1","3.3.0-2","3.3.0-3","3.3.0-4","3.3.0-5","3.3.0~git20240118.e802fe7-1","3.3.0~git20240118.e802fe7-2","3.3.0~git20240118.e802fe7-3","3.3.1-1","3.4.0-1","3.5.0-1","3.5.0~git20241129.2af7cef-1","3.5.0~git20241129.2af7cef-2","3.6.0-1","3.6.0-2","3.6.0-3","3.6.0-5","3.6.0-6","3.6.0-7","3.7.0-1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3","3.7.1-1","3.7.1-2","3.7.1-3","4.0.0-1","4.0.0-2"]},{"source":"osv","ecosystem":"Debian:13","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.0-1","3.6.0-1","3.6.0-2","3.6.0-3","3.6.0-5","3.6.0-6","3.6.0-7","3.7.0-1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3","3.7.1-1","3.7.1-2","3.7.1-3","4.0.0-1","4.0.0-2"]},{"source":"osv","ecosystem":"Debian:14","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.0-1","3.6.0-1","3.6.0-2","3.6.0-3","3.6.0-5","3.6.0-6","3.6.0-7","3.7.0-1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d2","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d3","3.7.1-1","3.7.1-2","3.7.1-3","4.0.0-1","4.0.0-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-0ubuntu4","2.4.0-0ubuntu5","2.5.0~git20160129.46a88d9-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu2","2.5.0~git20160219.522aca6-0ubuntu3","2.5.0-0ubuntu1","2.5.2-0ubuntu0.16.04.1","2.5.2-0ubuntu0.16.04.2","2.5.2-0ubuntu0.16.04.3","2.5.4-0ubuntu0.16.04.1","2.5.5-0ubuntu0.16.04.1","2.5.5-0ubuntu0.16.04.2","2.5.9-0ubuntu0.16.04.2","2.5.9-0ubuntu0.16.04.3","2.5.9-0ubuntu0.16.04.3+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.0-0ubuntu2","2.8.1-0ubuntu2","2.8.1-0ubuntu3","2.9.0~git20180205.5a39582ca-0ubuntu1","2.9.0-0ubuntu1","2.9.2-0ubuntu0.18.04.2","2.9.2-0ubuntu0.18.04.3","2.9.5-0ubuntu0.18.04.1","2.9.7-0ubuntu0.18.04.2","2.9.8-0ubuntu0.18.04.2","2.9.8-0ubuntu0.18.04.3","2.9.8-0ubuntu0.18.04.4","2.9.8-0ubuntu0.18.04.5","2.9.8-0ubuntu0.18.04.5+esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.0-0ubuntu1","2.12.0-0ubuntu2","2.12.1~git20191107.7accd1302-0ubuntu1","2.12.90~git20200107.af683565b-0ubuntu1","2.12.90~git20200107.af683565b-0ubuntu2","2.12.90~git20200107.af683565b-0ubuntu3","2.13.0~git20200127.dbdf66c29-0ubuntu2","2.13.0~git20200212.15ae9db33-0ubuntu1","2.13.0~git20200212.15ae9db33-0ubuntu2","2.13.0-0ubuntu1","2.13.1-0ubuntu0.20.04.1","2.13.1-0ubuntu0.20.04.3","2.13.1-0ubuntu0.20.04.4","2.13.3-0ubuntu0.20.04.1","2.13.3-0ubuntu0.20.04.2","2.13.5-0ubuntu1","2.13.8-0ubuntu1","2.13.8-0ubuntu1.1","2.13.8-0ubuntu1.2","2.13.8-0ubuntu1.3","2.13.8-0ubuntu1.4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.0-0ubuntu2","2.16.0-0ubuntu3","2.16.0-0ubuntu4","2.17.0~git20220105.0d1ffb7-0ubuntu1","2.17.0~git20220118.1b9fd88-0ubuntu1","2.17.0~git20220121.109d024-0ubuntu1","2.17.0-0ubuntu1","2.17.2-0ubuntu0.22.04.1","2.17.2-0ubuntu0.22.04.2","2.17.3-0ubuntu0.22.04.1","2.17.3-0ubuntu0.22.04.2","2.17.5-0ubuntu0.22.04.2","2.17.7-0ubuntu0.22.04.1","2.17.8-0ubuntu0.22.04.1","2.17.9-0ubuntu0.22.04.1","2.17.9-0ubuntu0.22.04.2","2.17.12-0ubuntu0.22.04.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.2.0-2","3.2.0-2build1","3.2.2~git20231029-2","3.2.2~git20231029-2build1","3.3.0~git20240118.e802fe7-2","3.3.0~git20240118.e802fe7-3","3.3.0-1","3.3.0-1build1","3.3.0-1ubuntu1","3.3.0-1ubuntu3","3.3.0-1ubuntu3.1","3.3.0-1ubuntu3.2","3.3.4-0ubuntu0.24.04.1","3.3.4-0ubuntu0.24.04.2","3.3.9-0ubuntu0.24.04.1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.0-1build1","3.5.1-0ubuntu1","3.6.0-1","3.6.0-2","3.6.0-2ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.1-2","3.7.1-3","3.7.1-3build1","4.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"openvswitch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.0-2","3.6.0-2build1","3.6.0-5","3.6.0-6","3.6.0-6build1","3.6.0-6ubuntu2","3.7.0~git20260211.8c6ebf8-1~1.gbp9127d1","3.7.0-1","3.7.0-1build1","3.7.1-1","3.7.1-2"]}],"references":[{"url":"https://github.com/majdlatah/OVS-Other-Config-Bug","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-36499"},{"url":"http://open.com"},{"url":"https://github.com/advisories/GHSA-87x4-f37w-27p2"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-36499","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-36499","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-36499","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-36499","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T00:00:00Z","modified":"2026-06-06T19:34:00.96Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:19:55.176387Z"}],"euvd":[{"id":"EUVD-2026-34317","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T00:00:00Z","modified":"2026-06-06T19:34:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T18:20:49.780813Z"}],"ghsa":[{"id":"GHSA-87x4-f37w-27p2","title":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an...","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T21:31:22Z","modified":"2026-06-04T21:31:22Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:08:33.048787Z"}],"nvd":[{"id":"CVE-2026-36499","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T19:16:28.563Z","modified":"2026-07-22T20:10:00.127Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:22.022466Z"}],"osv":[{"id":"DEBIAN-CVE-2026-36499","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T19:16:28.563Z","modified":"2026-10-01T03:03:04.248404749Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:54.587575Z"},{"id":"UBUNTU-CVE-2026-36499","description":"A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.","status":"published","published":"2026-06-04T19:16:00Z","modified":"2026-10-17T12:58:13.486950198Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:16.686388Z"}]}}