CVE-2024-35894 mptcp: prevent BPF accessing lowat from a subflow socket.

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mptcp/sockopt.c"
    ],
    "versions": [
      {
        "version": "124a4885b55f3039c697feb53edc5ad88bf21161",
        "lessThan": "ee3c845787b621cfe82c2e52c513024a9d7a78f5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5684ab1a0effbfeb706f47d85785f653005b97b1",
        "lessThan": "3ffb1ab698376f09cc33101c07c1be229389fe29",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5684ab1a0effbfeb706f47d85785f653005b97b1",
        "lessThan": "fcf4692fa39e86a590c14a4af2de704e1d20a3b5",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mptcp/sockopt.c"
    ],
    "versions": [
      {
        "version": "6.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.7",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.8.5",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]