{"api_version":"1","generated_at":"2026-05-28T03:14:29+00:00","cve":"CVE-2026-45860","urls":{"html":"https://cve.report/CVE-2026-45860","api":"https://cve.report/api/cve/CVE-2026-45860.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-45860","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45860"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-05-27 14:16:58","updated_at":"2026-05-27 14:48:31"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966","name":"https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a","name":"https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3","name":"https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c","name":"https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff","name":"https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79","name":"https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24","name":"https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db","name":"https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45860","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45860","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f106694733c66a48740c25bc4e212e9b2ea364ce a5c9e14e0e8923218ae881d5e78c990c07694966 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected be69850b461e7b491d87a22e33ab76fdd04b725e 13eede458fdf231f1bf96a398feea4ad1553f14c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee fa85432d58c8e74b39333edbf8d28df2985dfc79 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee 0792ad077d776c2dcf20f0484e2461ded1b77a24 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee 3d0994ed0aa1fc0a2c5e620b765e8defdd021bff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee 6e5fa7add3e76da068a478d905be64be8fa4e80a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee 0af0812baf2d363176c9b76fc07e33f13aede8db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d265929930e2ffafc744c0ae05fb70acd53be1ee 21d033e472735ecec677f1ae46d6740b5e47a4f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.248 5.10.252 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.198 5.15.202 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.252 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.202 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.165 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.128 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/netfilter/nf_conntrack_count.h","net/netfilter/nf_conncount.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a5c9e14e0e8923218ae881d5e78c990c07694966","status":"affected","version":"f106694733c66a48740c25bc4e212e9b2ea364ce","versionType":"git"},{"lessThan":"13eede458fdf231f1bf96a398feea4ad1553f14c","status":"affected","version":"be69850b461e7b491d87a22e33ab76fdd04b725e","versionType":"git"},{"lessThan":"fa85432d58c8e74b39333edbf8d28df2985dfc79","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"0792ad077d776c2dcf20f0484e2461ded1b77a24","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"3d0994ed0aa1fc0a2c5e620b765e8defdd021bff","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"6e5fa7add3e76da068a478d905be64be8fa4e80a","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"0af0812baf2d363176c9b76fc07e33f13aede8db","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"21d033e472735ecec677f1ae46d6740b5e47a4f3","status":"affected","version":"d265929930e2ffafc744c0ae05fb70acd53be1ee","versionType":"git"},{"lessThan":"5.10.252","status":"affected","version":"5.10.248","versionType":"semver"},{"lessThan":"5.15.202","status":"affected","version":"5.15.198","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/netfilter/nf_conntrack_count.h","net/netfilter/nf_conncount.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.252","versionStartIncluding":"5.10.248","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.202","versionStartIncluding":"5.15.198","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.165","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.128","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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"}],"providerMetadata":{"dateUpdated":"2026-05-27T12:15:40.080Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966"},{"url":"https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c"},{"url":"https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79"},{"url":"https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24"},{"url":"https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff"},{"url":"https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a"},{"url":"https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db"},{"url":"https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3"}],"title":"netfilter: nf_conncount: increase the connection clean up limit to 64","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-45860","datePublished":"2026-05-27T12:15:40.080Z","dateReserved":"2026-05-13T15:03:33.080Z","dateUpdated":"2026-05-27T12:15:40.080Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:16:58","lastModifiedDate":"2026-05-27 14:48:31","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"45860","Ordinal":"1","Title":"netfilter: nf_conncount: increase the connection clean up limit ","CVE":"CVE-2026-45860","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"45860","Ordinal":"1","NoteData":"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","Type":"Description","Title":"netfilter: nf_conncount: increase the connection clean up limit "}]}}}