CVE-2026-99070 (GCVE-0-2026-99070)
Vulnerability from cvelistv5
Published
2026-10-23 12:23
Modified
2026-10-30 12:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: do not warn on route notification size race fib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later fills it with rt6_fill_node(). With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. rt6_fill_node() can then legitimately return -EMSGSIZE, so the warning does not prove a sizing bug. Remove the warning. The existing error path still frees the skb and reports the error to listeners.
References
Impacted products
Vendor Product Version
Linux Linux Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
Version: 907eea486888cfe118c19759bbc4b8fca2e004df
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{
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      ],
      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: do not warn on route notification size race\n\nfib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later\nfills it with rt6_fill_node().  With nexthop compatibility mode enabled,\na concurrent replacement can grow the group between these independent\nsnapshots.  rt6_fill_node() can then legitimately return -EMSGSIZE, so\nthe warning does not prove a sizing bug.\n\nRemove the warning.  The existing error path still frees the skb and\nreports the error to listeners."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:41:29.857Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485"
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      "title": "ipv6: do not warn on route notification size race",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99070",
    "datePublished": "2026-10-23T12:23:13.342Z",
    "dateReserved": "2026-09-25T10:25:14.389Z",
    "dateUpdated": "2026-10-30T12:41:29.857Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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