CVE-2026-98548

{
  "etk_id": "ETK-2026-2437",
  "cve_id": "CVE-2026-98548",
  "display_id": "CVE-2026-98548",
  "ghsa_id": "GHSA-3mq3-vc9v-9wmc",
  "euvd_id": "EUVD-2026-103593",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Use-after-free in Linux kernel SCTP handling",
  "summary": "Affected Linux kernel SCTP implementations can retain a reference to a released network transport after processing a stale-cookie error. An SCTP peer or an unprivileged local user able to use SCTP may trigger a kernel memory-safety failure. Systems are exposed when SCTP is enabled and reachable by untrusted peers or usable by untrusted local users.",
  "mitigation": "Update to a Linux kernel release containing one of these fixed commits: c0af3fd150fdc43821df3bb77e5ec74faf4dfc7a, 854c053c71459f8db7ef07db9cfa4eec5f5206f2, 965e21ea16acb394d5e5801998ca9b0adc669665, 1cd246b214dc9acf4e2f11d58c035e1e672fe7d2, d68c9287b3ca0d6faadc61fbcb18d1a6b5493321, ec23855274a73906b02f0d124fefd9cb3c008b1d, 6df536c5acbc0abd6f119d02e24f4a2ed97707f4, 6df536c5acbc0abd6f119d02e24f4a2ed97707f4, or 4498467a8af06cfa3d71cb04bd7c4170dec8f449. Until patched, disable SCTP or limit SCTP communication to trusted peers where feasible.",
  "vendor": "Linux",
  "product": "Linux",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c0af3fd150fdc43821df3bb77e5ec74faf4dfc7a",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 854c053c71459f8db7ef07db9cfa4eec5f5206f2",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 965e21ea16acb394d5e5801998ca9b0adc669665",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1cd246b214dc9acf4e2f11d58c035e1e672fe7d2",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d68c9287b3ca0d6faadc61fbcb18d1a6b5493321",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ec23855274a73906b02f0d124fefd9cb3c008b1d",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6df536c5acbc0abd6f119d02e24f4a2ed97707f4",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4498467a8af06cfa3d71cb04bd7c4170dec8f449"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "c0af3fd150fdc43821df3bb77e5ec74faf4dfc7a",
        "854c053c71459f8db7ef07db9cfa4eec5f5206f2",
        "965e21ea16acb394d5e5801998ca9b0adc669665",
        "1cd246b214dc9acf4e2f11d58c035e1e672fe7d2",
        "d68c9287b3ca0d6faadc61fbcb18d1a6b5493321",
        "ec23855274a73906b02f0d124fefd9cb3c008b1d",
        "6df536c5acbc0abd6f119d02e24f4a2ed97707f4",
        "4498467a8af06cfa3d71cb04bd7c4170dec8f449"
      ],
      "package_name": "Linux",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "2.6.12"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Linux",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 10.194545,
  "t0_at": "2026-10-18T15:18:16.510000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-22T13:01:02.938511+00:00",
      "days": 3.9047040336921297,
      "is_lower_bound": false,
      "measured_at": "2026-10-18T15:18:16.510000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-18T15:18:16.510000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-18T15:18:16.510000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-98548"
    }
  }
}