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CVE-2026-43057 net: correctly handle tunneled traffic on IPV6_CSUM GSO fallback

🗓️ 01 May 2026 14:15:49Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 30 Views

Fix IPv6 checksum GSO fallback for tunneled packets by checking inner header length; SCTP in UDP uses software GSO.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/dev.c"
    ],
    "versions": [
      {
        "version": "a0478d7e888028f85fa7785ea838ce0ca09398e2",
        "lessThan": "2094a7cf91b71367b649f991aacc7b579f793d0b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2156d9e9f2e483c8c3906c0ea57ea312c1424235",
        "lessThan": "ed71cf465c75f5688b07a35d373cd1d6b589c8ea",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "041e2f945f82fdbd6fff577b79c33469430297aa",
        "lessThan": "33670f780e0120c3dacda188c512bbffe0b6044c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "864e3396976ef41de6cc7bc366276bf4e084fff2",
        "lessThan": "a98b78116a27e2a57b696b569b2cb431c95cf9b6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "864e3396976ef41de6cc7bc366276bf4e084fff2",
        "lessThan": "732fdeb2987c94b439d51f5cb9addddc2fc48c42",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "864e3396976ef41de6cc7bc366276bf4e084fff2",
        "lessThan": "c4336a07eb6b2526dc2b62928b5104b41a7f81f5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "794ddbb7b63b6828c75967b9bcd43b086716e7a1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6.1.149",
        "lessThan": "6.1.168",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.103",
        "lessThan": "6.6.134",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.44",
        "lessThan": "6.12.81",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.16.4",
        "lessThan": "6.17",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/dev.c"
    ],
    "versions": [
      {
        "version": "6.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.168",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.134",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.81",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.22",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.12",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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