{"api_version":"1","generated_at":"2026-08-16T05:01:57+00:00","cve":"CVE-2026-74564","urls":{"html":"https://cve.report/CVE-2026-74564","api":"https://cve.report/api/cve/CVE-2026-74564.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74564","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74564"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:18:01","updated_at":"2026-08-15 13:18:01"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf","name":"https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b","name":"https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f","name":"https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22","name":"https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0","name":"https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74564","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74564","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bea74641e3786d51dcf1175527cc1781420961c9 24683fea1f06bd3bd2707b99460e859bc6464c22 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bea74641e3786d51dcf1175527cc1781420961c9 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bea74641e3786d51dcf1175527cc1781420961c9 d186f77d18bdfb252d401ff992ca3001a6a65a0f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bea74641e3786d51dcf1175527cc1781420961c9 06a76334243ccd875a981aa8bb46c0f931ef1e3b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bea74641e3786d51dcf1175527cc1781420961c9 305b63e1402267459fdabb183af4527f6799eebf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc6 * 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":["net/netfilter/xt_hashlimit.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"24683fea1f06bd3bd2707b99460e859bc6464c22","status":"affected","version":"bea74641e3786d51dcf1175527cc1781420961c9","versionType":"git"},{"lessThan":"32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0","status":"affected","version":"bea74641e3786d51dcf1175527cc1781420961c9","versionType":"git"},{"lessThan":"d186f77d18bdfb252d401ff992ca3001a6a65a0f","status":"affected","version":"bea74641e3786d51dcf1175527cc1781420961c9","versionType":"git"},{"lessThan":"06a76334243ccd875a981aa8bb46c0f931ef1e3b","status":"affected","version":"bea74641e3786d51dcf1175527cc1781420961c9","versionType":"git"},{"lessThan":"305b63e1402267459fdabb183af4527f6799eebf","status":"affected","version":"bea74641e3786d51dcf1175527cc1781420961c9","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/xt_hashlimit.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.14"},{"lessThan":"4.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc6","versionStartIncluding":"4.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-15T12:28:06.392Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22"},{"url":"https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0"},{"url":"https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f"},{"url":"https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b"},{"url":"https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf"}],"title":"netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74564","datePublished":"2026-08-15T12:28:06.392Z","dateReserved":"2026-08-15T05:44:03.916Z","dateUpdated":"2026-08-15T12:28:06.392Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:18:01","lastModifiedDate":"2026-08-15 13:18:01","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74564","Ordinal":"1","Title":"netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMI","CVE":"CVE-2026-74564","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74564","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMI"}]}}}