{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c886d70286bf3ad411eb3d689328a67f7102c6ae"
            },
            {
              "fixed": "8f11430d51ff8365bc51b670bc3002b65ae4c6b7"
            },
            {
              "fixed": "a09c87abf10a0a7e203137c75b5381aa63d9b31d"
            },
            {
              "fixed": "4c856f3c151a2f3fa237caa651c44015916ca584"
            },
            {
              "fixed": "42064de57fb83231fcc89663a94885f228a1ee53"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "fb9c73ef2ac2ec816efdc8b9267bc04e1369c20b"
            },
            {
              "last_affected": "8caf5c15b5288d52d9c89374d6c10fa32ee84ec5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.190"
            },
            {
              "fixed": "5.16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.19.4"
            },
            {
              "fixed": "5.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "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-2026-97523.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: close race between scheduler and state change\n\nThe mptcp scheduler may race with subflow sockets state change: data\ntransmission on the selected socket may fail and a later release could\ntry to use mss_now reset to 0 for a divide operation.\n\nAddress the issue by explicitly checking for the critical scenario.",
  "id": "CVE-2026-97523",
  "modified": "2026-09-27T03:30:27.132189192Z",
  "published": "2026-09-25T10:21:27.042Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42064de57fb83231fcc89663a94885f228a1ee53"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c856f3c151a2f3fa237caa651c44015916ca584"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f11430d51ff8365bc51b670bc3002b65ae4c6b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a09c87abf10a0a7e203137c75b5381aa63d9b31d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97523.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97523"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "mptcp: close race between scheduler and state change"
}