{"api_version":"1","generated_at":"2026-10-01T08:02:47+00:00","cve":"CVE-2026-97568","urls":{"html":"https://cve.report/CVE-2026-97568","api":"https://cve.report/api/cve/CVE-2026-97568.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97568","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97568"},"summary":{"title":"mptcp: syncookies: remember the request backup flag","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: syncookies: remember the request backup flag\n\nInstead of using an uninitialised bit when copying the info in\nsubflow_ulp_clone().\n\nTo fix this, no need to extend the join_entry structure: backup is\ncoming from struct mptcp_subflow_request_sock, only one bit. Do the same\nhere by using one bit for both.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:07","updated_at":"2026-09-25 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97568","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 61178d0b85b4b1b53e78b06e89d018d22d102f88 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 00b2bd518911e0daab00f4749cce68c191ccebb4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 06d649f9cd03a9f8e768a658b20acf8d2c8022e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 b76c0e28b392620dfbaf92cdeedbf115820b44cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: syncookies: remember the request backup flag\n\nInstead of using an uninitialised bit when copying the info in\nsubflow_ulp_clone().\n\nTo fix this, no need to extend the join_entry structure: backup is\ncoming from struct mptcp_subflow_request_sock, only one bit. Do the same\nhere by using one bit for both."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:21:54.269Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88"},{"url":"https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4"},{"url":"https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0"},{"url":"https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb"}],"title":"mptcp: syncookies: remember the request backup flag","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97568","datePublished":"2026-09-25T10:21:54.269Z","dateReserved":"2026-09-24T16:01:01.155Z","dateUpdated":"2026-09-25T10:21:54.269Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:07","lastModifiedDate":"2026-09-25 11:17:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97568","Ordinal":"1","Title":"mptcp: syncookies: remember the request backup flag","CVE":"CVE-2026-97568","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97568","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: syncookies: remember the request backup flag\n\nInstead of using an uninitialised bit when copying the info in\nsubflow_ulp_clone().\n\nTo fix this, no need to extend the join_entry structure: backup is\ncoming from struct mptcp_subflow_request_sock, only one bit. Do the same\nhere by using one bit for both.","Type":"Description","Title":"mptcp: syncookies: remember the request backup flag"}]}}}