pds_core: fix use-after-free on workqueue during remove

{
  "id": "be1ea0539a855a081d321edf2927a91172f6e74f49c94b4b752fa37aa7ae9982",
  "url": "https://osv.dev/vulnerability/CVE-2026-68318",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pds_core: fix use-after-free on workqueue during remove",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: pds_core: fix use-after-free on workqueue during remove In pdsc_remove(), the workqueue is destroyed before pdsc_teardown() is called. This ordering allows two paths to queue work on the destroyed workqueue: 1. If pdsc_teardown() -> pdsc_devcmd_reset() times out, the error path in pdsc_devcmd_locked() queues health_work. 2. A NotifyQ event can trigger the ISR and queue work before free_irq() is called in pdsc_teardown(). Fix by moving destroy_workqueue() after pdsc_teardown() so the workqueue outlives every queuer; destroy_workqueue() then flushes any work still pending. Draining the queued work also requires ordering the teardown so the resources that work touches are freed last: - In pdsc_qcq_free(), after freeing the interrupt, cancel_work_sync() the queue's work and only then clear qcq->intx, so pdsc_process_adminq()'s read of qcq->intx for interrupt-credit return cannot race with the clear. - Free adminqcq before notifyqcq: the shared adminq ISR is released when adminqcq is freed, and the adminq work accesses notifyqcq, so both must be stopped before notifyqcq is freed.",
    "evidence": "osv:CVE-2026-68318",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-68318",
      "aliases": [
        "CVE-2026-68318"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "01ba61b55b2041a39c54aefb3153c770dd59a0ef"
                },
                {
                  "fixed": "bac237c2aedb8225bfd2317c1361bbfce1e419ca"
                },
                {
                  "fixed": "224214eb4182ff20a665b615a90b66017539dd75"
                },
                {
                  "fixed": "9e0f80fac50ab95dd75537c8ecaf5051d01f19b5"
                },
                {
                  "fixed": "ecc7a7d7569ec1d6a61e18372696b9de97635156"
                },
                {
                  "fixed": "0ad134881508c36b65c1a8864f8bec53adbd3327"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68318.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
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                {
                  "fixed": "6.12.101"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.42"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.6"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68318.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.746169586Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0ad134881508c36b65c1a8864f8bec53adbd3327",
        "https://git.kernel.org/stable/c/224214eb4182ff20a665b615a90b66017539dd75",
        "https://git.kernel.org/stable/c/9e0f80fac50ab95dd75537c8ecaf5051d01f19b5",
        "https://git.kernel.org/stable/c/bac237c2aedb8225bfd2317c1361bbfce1e419ca",
        "https://git.kernel.org/stable/c/ecc7a7d7569ec1d6a61e18372696b9de97635156",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68318.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68318",
        "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/2026/68xxx/CVE-2026-68318.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68318",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521778,
  "published_at": "2026-08-10T12:02:53.197+00:00"
}