{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "680aea08e78c003292415518ad270bc20f9c80b1"
            },
            {
              "fixed": "8b35e7767fdee63e57948a1ec89d9238a651f8c6"
            },
            {
              "fixed": "096ad0cb77f8da1928d04a0d170535e14ca6311b"
            },
            {
              "fixed": "088ba80eef85fa7a5ad8f9e7c82b403c99242b56"
            },
            {
              "fixed": "78a1cf5c54b2f795c81fedb530755a8d01cc84f0"
            },
            {
              "fixed": "7dfa7ca97f3ac46353edd4cc44f7733758e4535b"
            },
            {
              "fixed": "221ef5e1e44a044790f0f54e6aa237883f475a4d"
            },
            {
              "fixed": "e02a5b6588161673ef75a4bc5cdfb62bd493374d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.12.0"
            },
            {
              "fixed": "5.15.224"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.191"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.160"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99071.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: do not warn on route notification size race\n\nCommit 680aea08e78c (\"net: ipv4: Emit notification when fib hardware\nflags are changed\") added asynchronous route notifications for hardware\nflag changes.\n\nfib_alias_hw_flags_set() sizes the skb with fib_nlmsg_size() and later\nfills it with fib_dump_info() while holding only RCU.  With nexthop\ncompatibility mode enabled, a concurrent replacement can grow the group\nbetween these independent snapshots.  fib_dump_info() can then\nlegitimately return -EMSGSIZE, so the 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-2026-99071",
  "modified": "2026-11-01T02:30:46.362537405Z",
  "published": "2026-10-23T12:23:14.297Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/088ba80eef85fa7a5ad8f9e7c82b403c99242b56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/096ad0cb77f8da1928d04a0d170535e14ca6311b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/221ef5e1e44a044790f0f54e6aa237883f475a4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78a1cf5c54b2f795c81fedb530755a8d01cc84f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dfa7ca97f3ac46353edd4cc44f7733758e4535b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b35e7767fdee63e57948a1ec89d9238a651f8c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e02a5b6588161673ef75a4bc5cdfb62bd493374d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99071.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99071"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "summary": "ipv4: do not warn on route notification size race"
}