{"id":"CVE-2026-74564","revision":"f0985e60156f467088ec889a43c60994","records":[{"revision":"f0985e60156f467088ec889a43c60994","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74564","aliases":[],"title":"netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH\n\nThe XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the\ndsthash_ent structure which represents an entry in the hashtable.  There\nis a union area which uses a different layout to express the rate match\nmode.\n\nUpdate .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode\nflag is requested by two or more different rules that refer to the same\nhashtable. Otherwise, uninitialized access to the burst field in the\nunion is possible.\n\nReject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by\nrevision less than 3 too.","state":0,"publishedAt":"2026-08-15T12:28:06.392+00:00","modifiedAt":"2026-10-16T19:05:56.067+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/xt_hashlimit.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"402befce5854c195058cf4bab7c78ca286068a26\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"dee686b5e7f21180538ff719867702f411c8eb5c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"f76ab783e7d8d33e33dd7dfa697297f70d57b0e8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"24683fea1f06bd3bd2707b99460e859bc6464c22\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"d186f77d18bdfb252d401ff992ca3001a6a65a0f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"06a76334243ccd875a981aa8bb46c0f931ef1e3b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bea74641e3786d51dcf1175527cc1781420961c9\",\n                            \"lessThan\": \"305b63e1402267459fdabb183af4527f6799eebf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/xt_hashlimit.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/402befce5854c195058cf4bab7c78ca286068a26","https://git.kernel.org/stable/c/dee686b5e7f21180538ff719867702f411c8eb5c","https://git.kernel.org/stable/c/f76ab783e7d8d33e33dd7dfa697297f70d57b0e8","https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22","https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0","https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f","https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b","https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74564","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74564","identifiers":["CVE-2026-74564"]},"retained":false,"historicalAffected":[]}],"coverage":[]}