{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982"
            },
            {
              "fixed": "61178d0b85b4b1b53e78b06e89d018d22d102f88"
            },
            {
              "fixed": "00b2bd518911e0daab00f4749cce68c191ccebb4"
            },
            {
              "fixed": "06d649f9cd03a9f8e768a658b20acf8d2c8022e0"
            },
            {
              "fixed": "b76c0e28b392620dfbaf92cdeedbf115820b44cb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1008f2bcbc8e461c1df3aebba30ac4f616ebe570"
            },
            {
              "last_affected": "6f01f41b6a492ddf2da7609967cfaf57e7ca48a7"
            },
            {
              "last_affected": "09176f80995105c62939728fbad5c437d61e7ff4"
            },
            {
              "last_affected": "8ed3e34c766e8264d5d2e0436f86c51604d6a8a7"
            },
            {
              "last_affected": "73e2baa301ee3f62ff971e68877adeb37f98cc67"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.224"
            },
            {
              "fixed": "5.11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.165"
            },
            {
              "fixed": "5.16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.104"
            },
            {
              "fixed": "6.2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.45"
            },
            {
              "fixed": "6.7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.10.4"
            },
            {
              "fixed": "6.11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97568.json"
  },
  "details": "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",
  "modified": "2026-09-27T03:30:16.902627667Z",
  "published": "2026-09-25T10:21:54.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97568.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97568"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "mptcp: syncookies: remember the request backup flag"
}