{"id":"CVE-2026-97568","title":"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…","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 61178d0b85b4b1b53e78b06e89d018d22d102f88","Linux >= efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 00b2bd518911e0daab00f4749cce68c191ccebb4","Linux >= efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 06d649f9cd03a9f8e768a658b20acf8d2c8022e0","Linux >= efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < b76c0e28b392620dfbaf92cdeedbf115820b44cb","Linux 1008f2bcbc8e461c1df3aebba30ac4f616ebe570","Linux 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7","Linux 09176f80995105c62939728fbad5c437d61e7ff4","Linux 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7","Linux 73e2baa301ee3f62ff971e68877adeb37f98cc67","Linux >= 5.10.224 < 5.11","Linux >= 5.15.165 < 5.16","Linux >= 6.1.104 < 6.2","Linux >= 6.6.45 < 6.7","Linux >= 6.10.4 < 6.11","Linux 6.11"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:07.453","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97568","references":[{"url":"https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.912Z","slug":"CVE-2026-97568","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}