{"id":"CVE-2022-49110","revision":"432fbc180ecc467b92ad5540ec0386e0","records":[{"revision":"432fbc180ecc467b92ad5540ec0386e0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2022-49110","aliases":[],"title":"netfilter: conntrack: revisit gc autotuning","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: revisit gc autotuning\n\nas of commit 4608fdfc07e1\n(\"netfilter: conntrack: collect all entries in one cycle\")\nconntrack gc was changed to run every 2 minutes.\n\nOn systems where conntrack hash table is set to large value, most evictions\nhappen from gc worker rather than the packet path due to hash table\ndistribution.\n\nThis causes netlink event overflows when events are collected.\n\nThis change collects average expiry of scanned entries and\nreschedules to the average remaining value, within 1 to 60 second interval.\n\nTo avoid event overflows, reschedule after each bucket and add a\nlimit for both run time and number of evictions per run.\n\nIf more entries have to be evicted, reschedule and restart 1 jiffy\ninto the future.","state":0,"publishedAt":"2025-02-26T01:54:55.998+00:00","modifiedAt":"2026-10-15T21:21:06.919+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                        \"net/netfilter/nf_conntrack_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4608fdfc07e116f9fc0895beb40abad7cdb5ee3d\",\n                            \"lessThan\": \"58d52743ae85d28c9335c6034d6ce350b8689951\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4608fdfc07e116f9fc0895beb40abad7cdb5ee3d\",\n                            \"lessThan\": \"7cd361d5e6d986c0d4cafb9ceaa803359048ae15\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4608fdfc07e116f9fc0895beb40abad7cdb5ee3d\",\n                            \"lessThan\": \"592e57591826f3d09c28d755a39ea8e9d13705ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4608fdfc07e116f9fc0895beb40abad7cdb5ee3d\",\n                            \"lessThan\": \"2cfadb761d3d0219412fd8150faea60c7e863833\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"dafc95a1e473a0b857af34ecbb17b8b1c90edd75\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5892f910f401c1facfc410e0b042108f2827a77b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f68ad168e23565ce2a3891fec537cfaf8410d1e6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7aa03980b21fdc7355e20274a68a69a0b2a45c08\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4.19.206\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.144\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.62\",\n                            \"lessThan\": \"5.11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.13.14\",\n                            \"lessThan\": \"5.14\",\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                        \"net/netfilter/nf_conntrack_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.34\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.16.20\",\n                            \"lessThanOrEqual\": \"5.16.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.17.3\",\n                            \"lessThanOrEqual\": \"5.17.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.18\",\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/58d52743ae85d28c9335c6034d6ce350b8689951","https://git.kernel.org/stable/c/7cd361d5e6d986c0d4cafb9ceaa803359048ae15","https://git.kernel.org/stable/c/592e57591826f3d09c28d755a39ea8e9d13705ad","https://git.kernel.org/stable/c/2cfadb761d3d0219412fd8150faea60c7e863833"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49110","license":"CVE Program Terms of Use","key":"cve-program:CVE-2022-49110","identifiers":["CVE-2022-49110"]},"retained":false,"historicalAffected":[]}],"coverage":[]}