ipv4: Fix a data-race around sysctl_fib_multipath_use_neigh.

{
  "id": "19c05dd282916a04dd058f97f20b16ff5665f98c6a925527b8eb2b0206163aa2",
  "url": "https://osv.dev/vulnerability/CVE-2022-49580",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ipv4: Fix a data-race around sysctl_fib_multipath_use_neigh.",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix a data-race around sysctl_fib_multipath_use_neigh. While reading sysctl_fib_multipath_use_neigh, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader.",
    "evidence": "osv:CVE-2022-49580",
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    "severity": "medium",
    "structured": {
      "id": "CVE-2022-49580",
      "aliases": [
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
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      "modified": "2026-10-28T02:30:32.994983338Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/14e996577ed2799a1ed6ffeb71c76d63acb28444",
        "https://git.kernel.org/stable/c/6727f39e99e0f545d815edebb6c94228485427ec",
        "https://git.kernel.org/stable/c/87507bcb4f5de16bb419e9509d874f4db6c0ad0f",
        "https://git.kernel.org/stable/c/b8d345db03b4deffb4f04219a51d3b1e94171b76",
        "https://git.kernel.org/stable/c/e045d672ba06e1d35bacb56374d350de0ac99066",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49580.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49580",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49580.json"
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    "related_cves": [
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        "value": "CVE-2022-49580",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 499832,
  "published_at": "2025-02-26T02:23:18.667+00:00"
}