FKIE_CVE-2026-68318

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 05:18
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ad134881508c36b65c1a8864f8bec53adbd3327
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/224214eb4182ff20a665b615a90b66017539dd75
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e0f80fac50ab95dd75537c8ecaf5051d01f19b5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ecc7a7d7569ec1d6a61e18372696b9de97635156
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/core.c",
            "drivers/net/ethernet/amd/pds_core/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "224214eb4182ff20a665b615a90b66017539dd75",
              "status": "affected",
              "version": "01ba61b55b2041a39c54aefb3153c770dd59a0ef",
              "versionType": "git"
            },
            {
              "lessThan": "9e0f80fac50ab95dd75537c8ecaf5051d01f19b5",
              "status": "affected",
              "version": "01ba61b55b2041a39c54aefb3153c770dd59a0ef",
              "versionType": "git"
            },
            {
              "lessThan": "ecc7a7d7569ec1d6a61e18372696b9de97635156",
              "status": "affected",
              "version": "01ba61b55b2041a39c54aefb3153c770dd59a0ef",
              "versionType": "git"
            },
            {
              "lessThan": "0ad134881508c36b65c1a8864f8bec53adbd3327",
              "status": "affected",
              "version": "01ba61b55b2041a39c54aefb3153c770dd59a0ef",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/amd/pds_core/core.c",
            "drivers/net/ethernet/amd/pds_core/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: fix use-after-free on workqueue during remove\n\nIn pdsc_remove(), the workqueue is destroyed before pdsc_teardown()\nis called. This ordering allows two paths to queue work on the\ndestroyed workqueue:\n\n1. If pdsc_teardown() -\u003e pdsc_devcmd_reset() times out, the error\n   path in pdsc_devcmd_locked() queues health_work.\n\n2. A NotifyQ event can trigger the ISR and queue work before free_irq()\n   is called in pdsc_teardown().\n\nFix by moving destroy_workqueue() after pdsc_teardown() so the\nworkqueue outlives every queuer; destroy_workqueue() then flushes any\nwork still pending.\n\nDraining the queued work also requires ordering the teardown so the\nresources that work touches are freed last:\n\n  - In pdsc_qcq_free(), after freeing the interrupt, cancel_work_sync()\n    the queue\u0027s work and only then clear qcq-\u003eintx, so\n    pdsc_process_adminq()\u0027s read of qcq-\u003eintx for interrupt-credit\n    return cannot race with the clear.\n\n  - Free adminqcq before notifyqcq: the shared adminq ISR is released\n    when adminqcq is freed, and the adminq work accesses notifyqcq, so\n    both must be stopped before notifyqcq is freed."
    }
  ],
  "id": "CVE-2026-68318",
  "lastModified": "2026-08-17T05:18:34.727",
  "metrics": {},
  "published": "2026-08-10T13:20:21.813",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ad134881508c36b65c1a8864f8bec53adbd3327"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/224214eb4182ff20a665b615a90b66017539dd75"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9e0f80fac50ab95dd75537c8ecaf5051d01f19b5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ecc7a7d7569ec1d6a61e18372696b9de97635156"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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