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CVE-2026-64007 netfilter: synproxy: refresh tcphdr after skb_ensure_writable

🗓️ 19 Jul 2026 14:56:23Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 33 Views

CVE-2026-64007 fixes synproxy by re-deriving the tcp header after skb_ensure_writable.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netfilter/nf_synproxy_core.c"
    ],
    "versions": [
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "9902a1058992de5d95656b64a3bd95c077f7ba2c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "d3019c61799adc21811af4b521f11f3dc77f8e04",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "dd206819f210522579010d889d45a9530bb494bc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "af2c22ccb1f621aff487ff47a040e38e058541e7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "c7f945f7da097245a2f8ed7775ce48421047ee96",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "f0fea2b6d5453a11ad11713bbf37561b9b3a7edf",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "a91887a5b6ee4b98dfbf1db657ed2b879430149e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "48b1de4c110a7afa4b85862f6c75af817db26fad",
        "lessThan": "92170e6afe927ab2792a3f71902845789c8e31b1",
        "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/netfilter/nf_synproxy_core.c"
    ],
    "versions": [
      {
        "version": "3.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.259",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.210",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.176",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.143",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.93",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.35",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.12",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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05 Aug 2026 12:38Current
CVSS 3.19.8
EPSS0.00514
33