FKIE_CVE-2026-99070

Vulnerability from fkie_nvd - Published: 2026-10-23 13:17 - Updated: 2026-10-23 13:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8a3b935b6b6037eefb36bd27a60793a008358e8d",
              "status": "affected",
              "version": "907eea486888cfe118c19759bbc4b8fca2e004df",
              "versionType": "git"
            },
            {
              "lessThan": "7b112bd43f1172fb152e848570a957467008a5ae",
              "status": "affected",
              "version": "907eea486888cfe118c19759bbc4b8fca2e004df",
              "versionType": "git"
            },
            {
              "lessThan": "4ac7d92a4698e34e614c254359665b9de1f65283",
              "status": "affected",
              "version": "907eea486888cfe118c19759bbc4b8fca2e004df",
              "versionType": "git"
            },
            {
              "lessThan": "291fe0bafee78c95f9f2e7f579f17793fd5a1e5a",
              "status": "affected",
              "version": "907eea486888cfe118c19759bbc4b8fca2e004df",
              "versionType": "git"
            },
            {
              "lessThan": "c97426ec649d99596d8969e1a052c16b14b7b485",
              "status": "affected",
              "version": "907eea486888cfe118c19759bbc4b8fca2e004df",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-99070",
  "lastModified": "2026-10-23T13:17:30.907",
  "metrics": {},
  "published": "2026-10-23T13:17:30.907",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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