In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list...

{
  "credits": [],
  "cve_id": "CVE-2026-98102",
  "cvss": {
    "score": null,
    "vector_string": null
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 0.0,
      "vector_string": null
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [],
  "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()\n\nWhen removing a source filter whose count reaches zero, ip6_mc_del1_src()\nunlinks psf from pmc->mca_sources. If the filter was previously active,\nthe code moved psf directly into pmc->mca_tomb by updating psf->sf_next.\n\nBecause pmc->mca_sources is traversed locklessly under RCU (e.g. by\nipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period\nelapses diverts concurrent readers to the tombstone list. Consequently,\nreaders miss remaining active sources in pmc->mca_sources and improperly\nexamine deleted tombstone entries.\n\nFix this by allocating a new tombstone node for pmc->mca_tomb (as done\nin sf_setstate()) and retiring the original psf via kfree_rcu().",
  "epss": {
    "percentage": 0.00168,
    "percentile": 0.05397
  },
  "ghsa_id": "GHSA-g228-xhf6-wqq6",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-g228-xhf6-wqq6",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-g228-xhf6-wqq6"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-98102"
    }
  ],
  "nvd_published_at": "2026-09-25T11:17:39Z",
  "published_at": "2026-09-25T12:31:36Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-98102",
    "https://git.kernel.org/stable/c/4352737297b262e8367675c19a7dc6a9f53c97af",
    "https://git.kernel.org/stable/c/5149c60c406595b56fda0c6e9aae7fd287f636aa",
    "https://git.kernel.org/stable/c/8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4",
    "https://git.kernel.org/stable/c/93b49239840b91313adbd77b8b52993eff2d08c1",
    "https://github.com/advisories/GHSA-g228-xhf6-wqq6"
  ],
  "repository_advisory_url": null,
  "severity": "unknown",
  "source_code_location": "",
  "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: fix RCU list...",
  "type": "unreviewed",
  "updated_at": "2026-09-25T12:31:47Z",
  "url": "https://api.github.com/advisories/GHSA-g228-xhf6-wqq6",
  "vulnerabilities": [],
  "withdrawn_at": null
}