CVE-2026-72421 ipv4: fib: Don't ignore error route in local/main tables.

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/ip_fib.h"
    ],
    "versions": [
      {
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  },
  {
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    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/ip_fib.h"
    ],
    "versions": [
      {
        "version": "3.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.261",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.212",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
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      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
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      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
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      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
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      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
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      },
      {
        "version": "7.2-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]