{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97568", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.155Z", "datePublished": "2026-09-25T10:21:54.269Z", "dateUpdated": "2026-09-25T10:21:54.269Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T10:21:54.269Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mptcp/syncookies.c"], "versions": [{"version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "lessThan": "61178d0b85b4b1b53e78b06e89d018d22d102f88", "status": "affected", "versionType": "git"}, {"version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "lessThan": "00b2bd518911e0daab00f4749cce68c191ccebb4", "status": "affected", "versionType": "git"}, {"version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "lessThan": "06d649f9cd03a9f8e768a658b20acf8d2c8022e0", "status": "affected", "versionType": "git"}, {"version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "lessThan": "b76c0e28b392620dfbaf92cdeedbf115820b44cb", "status": "affected", "versionType": "git"}, {"version": "1008f2bcbc8e461c1df3aebba30ac4f616ebe570", "status": "affected", "versionType": "git"}, {"version": "6f01f41b6a492ddf2da7609967cfaf57e7ca48a7", "status": "affected", "versionType": "git"}, {"version": "09176f80995105c62939728fbad5c437d61e7ff4", "status": "affected", "versionType": "git"}, {"version": "8ed3e34c766e8264d5d2e0436f86c51604d6a8a7", "status": "affected", "versionType": "git"}, {"version": "73e2baa301ee3f62ff971e68877adeb37f98cc67", "status": "affected", "versionType": "git"}, {"version": "5.10.224", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.165", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.1.104", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.45", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.10.4", "lessThan": "6.11", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mptcp/syncookies.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.3-rc3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.4"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/mptcp/syncookies.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "61178d0b85b4b1b53e78b06e89d018d22d102f88", "status": "affected", "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "versionType": "git"}, {"lessThan": "00b2bd518911e0daab00f4749cce68c191ccebb4", "status": "affected", "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "versionType": "git"}, {"lessThan": "06d649f9cd03a9f8e768a658b20acf8d2c8022e0", "status": "affected", "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "versionType": "git"}, {"lessThan": "b76c0e28b392620dfbaf92cdeedbf115820b44cb", "status": "affected", "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982", "versionType": "git"}, {"status": "affected", "version": "1008f2bcbc8e461c1df3aebba30ac4f616ebe570", "versionType": "git"}, {"status": "affected", "version": "6f01f41b6a492ddf2da7609967cfaf57e7ca48a7", "versionType": "git"}, {"status": "affected", "version": "09176f80995105c62939728fbad5c437d61e7ff4", "versionType": "git"}, {"status": "affected", "version": "8ed3e34c766e8264d5d2e0436f86c51604d6a8a7", "versionType": "git"}, {"status": "affected", "version": "73e2baa301ee3f62ff971e68877adeb37f98cc67", "versionType": "git"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.224", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.165", "versionType": "semver"}, {"lessThan": "6.2", "status": "affected", "version": "6.1.104", "versionType": "semver"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.45", "versionType": "semver"}, {"lessThan": "6.11", "status": "affected", "version": "6.10.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/mptcp/syncookies.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-97568", "lastModified": "2026-09-25T11:17:07.453", "metrics": {}, "published": "2026-09-25T11:17:07.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

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