{"api_version":"1","generated_at":"2026-05-11T11:04:35+00:00","cve":"CVE-2026-43452","urls":{"html":"https://cve.report/CVE-2026-43452","api":"https://cve.report/api/cve/CVE-2026-43452.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43452","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43452"},"summary":{"title":"netfilter: x_tables: guard option walkers against 1-byte tail reads","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: guard option walkers against 1-byte tail reads\n\nWhen the last byte of options is a non-single-byte option kind, walkers\nthat advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end\nof the option area.\n\nAdd an explicit i == optlen - 1 check before dereferencing op[i + 1]\nin xt_tcpudp and xt_dccp option walkers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:57","updated_at":"2026-05-11 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the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: guard option walkers against 1-byte tail reads\n\nWhen the last byte of options is a non-single-byte option kind, walkers\nthat advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end\nof the option area.\n\nAdd an explicit i == optlen - 1 check before dereferencing op[i + 1]\nin xt_tcpudp and xt_dccp option walkers."}],"metrics":[{"cvssV3_1":{"baseScore":8.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-11T06:34:38.106Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a"},{"url":"https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823"},{"url":"https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907"},{"url":"https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540"},{"url":"https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c"},{"url":"https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5"},{"url":"https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36"},{"url":"https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4"}],"title":"netfilter: x_tables: guard option walkers against 1-byte tail reads","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43452","datePublished":"2026-05-08T14:22:17.361Z","dateReserved":"2026-05-01T14:12:56.010Z","dateUpdated":"2026-05-11T06:34:38.106Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:57","lastModifiedDate":"2026-05-11 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walkers\nthat advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end\nof the option area.\n\nAdd an explicit i == optlen - 1 check before dereferencing op[i + 1]\nin xt_tcpudp and xt_dccp option walkers.","Type":"Description","Title":"netfilter: x_tables: guard option walkers against 1-byte tail re"}]}}}