{"id":"CVE-2026-45860","revision":"a7ef7ccec70a46af8248070c843915c3","records":[{"revision":"a7ef7ccec70a46af8248070c843915c3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-45860","aliases":[],"title":"netfilter: nf_conncount: increase the connection clean up limit to 64","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conncount: increase the connection clean up limit to 64\n\nAfter the optimization to only perform one GC per jiffy, a new problem\nwas introduced. If more than 8 new connections are tracked per jiffy the\nlist won't be cleaned up fast enough possibly reaching the limit\nwrongly.\n\nIn order to prevent this issue, only skip the GC if it was already\ntriggered during the same jiffy and the increment is lower than the\nclean up limit. In addition, increase the clean up limit to 64\nconnections to avoid triggering GC too often and do more effective GCs.\n\nThis has been tested using a HTTP server and several\nperformance tools while having nft_connlimit/xt_connlimit or OVS limit\nconfigured.\n\nOutput of slowhttptest + OVS limit at 52000 connections:\n\n slow HTTP test status on 340th second:\n initializing:        0\n pending:             432\n connected:           51998\n error:               0\n closed:              0\n service available:   YES","state":0,"publishedAt":"2026-05-27T12:15:40.08+00:00","modifiedAt":"2026-10-19T19:26:38.757+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/netfilter/nf_conntrack_count.h\",\n                        \"net/netfilter/nf_conncount.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f106694733c66a48740c25bc4e212e9b2ea364ce\",\n                            \"lessThan\": \"a5c9e14e0e8923218ae881d5e78c990c07694966\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be69850b461e7b491d87a22e33ab76fdd04b725e\",\n                            \"lessThan\": \"13eede458fdf231f1bf96a398feea4ad1553f14c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"fa85432d58c8e74b39333edbf8d28df2985dfc79\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"0792ad077d776c2dcf20f0484e2461ded1b77a24\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"3d0994ed0aa1fc0a2c5e620b765e8defdd021bff\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"6e5fa7add3e76da068a478d905be64be8fa4e80a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"0af0812baf2d363176c9b76fc07e33f13aede8db\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d265929930e2ffafc744c0ae05fb70acd53be1ee\",\n                            \"lessThan\": \"21d033e472735ecec677f1ae46d6740b5e47a4f3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.248\",\n                            \"lessThan\": \"5.10.252\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.198\",\n                            \"lessThan\": \"5.15.202\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/netfilter/nf_conntrack_count.h\",\n                        \"net/netfilter/nf_conncount.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.252\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.202\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.165\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.128\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.75\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.14\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.4\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966","https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c","https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79","https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24","https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff","https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a","https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db","https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45860","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-45860","identifiers":["CVE-2026-45860"]},"retained":false,"historicalAffected":[]}],"coverage":[]}