{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-98749",
  "modified": "2026-10-19T04:30:01Z",
  "upstream": [
    "CVE-2026-98749"
  ],
  "published": "2026-10-18T15:54:51Z",
  "summary": "tty: serial: max3100: shut down timer before freeing port",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: max3100: shut down timer before freeing port\n\nmax3100_shutdown() stops the polling timer but returns early during\nsystem suspend. If the SPI device is unbound before resume, the serial\ncore does not call max3100_shutdown() again, so max3100_remove() frees\nthe port while the timer remains armed. max3100_timeout() may then\naccess the freed port and re-arm the timer.\n\nAdd final timer teardown to max3100_remove() and use\ntimer_shutdown_sync() to prevent a racing callback from re-arming it.\nAlso free the IRQ and destroy the workqueue there before freeing the\nport. Keep timer_delete_sync() in max3100_shutdown() so that a\nsubsequent open() can re-arm the timer.\n\nThe workqueue is created before request_irq() and destroyed on both\nrequest_irq() failure and normal shutdown. Its presence at remove thus\nidentifies the IRQ left registered when suspend bypasses shutdown.\n\nFree the IRQ before destroying the workqueue, in both\nmax3100_shutdown() and max3100_remove(), and cancel the pending work\nin between. free_irq() waits for a running interrupt handler to\nfinish and no new handler can start afterwards, so a racing handler\ncannot queue work on a workqueue that is being destroyed; the\nforce_end_work check in max3100_dowork() only narrows that window, as\na handler delayed between the check and queue_work() could still run\nafter the teardown has cleared the workqueue pointer. Cancelling the\nwork also keeps destroy_workqueue() from waiting on a queued work item\nin case remove() ever runs while the freezable workqueue is still\nfrozen, e.g. device removal during the resume window, before\nworkqueues are thawed.\n\nThis issue was found by an in-house static analysis tool.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-98749"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fb668620e3b163962dabe1a674725a07aa44ff4a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2c8614981d3e6e000427de0ab2426ab68274d850"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/247b8f680876313586aed4d267bfcceddc2b4901"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/db0949bbd06db0a75b4b1076f1e25194be7d956a"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-18T15:54:51Z"
  }
}