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CVE-2025-39955 tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect().

🗓️ 09 Oct 2025 09:47:33Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 9 Views

CVE-2025-39955 clears fastopen_rsk in tcp_disconnect to prevent stale fastopen and retransmit timer.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/tcp.c"
    ],
    "versions": [
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "7ec092a91ff351dcde89c23e795b73a328274db6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "a4378dedd6e07e62f2fccb17d78c9665718763d0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "33a4fdf0b4a25f8ce65380c3b0136b407ca57609",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "17d699727577814198d744d6afe54735c6b54c99",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "dfd06131107e7b699ef1e2a24ed2f7d17c917753",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "fa4749c065644af4db496b338452a69a3e5147d9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "ae313d14b45eca7a6bb29cb9bf396d977e7d28fb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8336886f786fdacbc19b719c1f7ea91eb70706d4",
        "lessThan": "45c8a6cc2bcd780e634a6ba8e46bffbdf1fc5c01",
        "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/ipv4/tcp.c"
    ],
    "versions": [
      {
        "version": "3.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.7",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.4.300",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.245",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.194",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.154",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.108",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.49",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.16.9",
        "lessThanOrEqual": "6.16.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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