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CVE-2026-23200 ipv6: Fix ECMP sibling count mismatch when clearing RTF_ADDRCONF

🗓️ 14 Feb 2026 16:27:25Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 23 Views

Fix ECMP sibling count mismatch by only clearing address configuration flag for routes without a gateway.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_fib.c"
    ],
    "versions": [
      {
        "version": "cb2b0caa8ca93cbe39177516669bf699c74f7041",
        "lessThan": "50b7c7a255858a85c4636a1e990ca04591153dca",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "03f642caab84bbfd138e74f671bb436186ea7e82",
        "lessThan": "d8143c54ceeba232dc8a13aa0afa14a44b371d93",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3e5b25da0b4109a3e063759735e6ec4236ea5a05",
        "lessThan": "b8ad2d53f706aeea833d23d45c0758398fede580",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f72514b3c5698e4b900b25345e09f9ed33123de6",
        "lessThan": "bbf4a17ad9ffc4e3d7ec13d73ecd59dea149ed25",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "61d88ea0f30c88e4ea98793594943aed8f1fc9ab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6.17.13",
        "lessThan": "6.18",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_fib.c"
    ],
    "versions": [
      {
        "version": "6.6.120",
        "lessThan": "6.6.124",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.63",
        "lessThan": "6.12.70",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.18.2",
        "lessThan": "6.18.10",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  }
]

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