net: mana: Skip redundant detach on already-detached port

{
  "id": "95ff7b4299023e95d9572573a3ba8e9a08b76ac849e9c3e3bfa5ef22cf40a25b",
  "url": "https://osv.dev/vulnerability/CVE-2026-63972",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: mana: Skip redundant detach on already-detached port",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: mana: Skip redundant detach on already-detached port When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown. Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.",
    "evidence": "osv:CVE-2026-63972",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-63972",
      "aliases": [
        "CVE-2026-63972"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.18.33"
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              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "0"
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                  "introduced": "6.19.0"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
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      ],
      "modified": "2026-10-28T02:30:22.625089005Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3",
        "https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846",
        "https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63972.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63972",
        "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/2026/63xxx/CVE-2026-63972.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63972",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488933,
  "published_at": "2026-07-19T14:55:58.503+00:00"
}