{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-98347",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-98347"
  ],
  "published": "2026-10-06T08:47:10Z",
  "summary": "IB/IPoIB: Avoid restoring OPER_UP after multicast flush",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown.",
  "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": "6.1.189",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-98347"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-06T08:47:10Z"
  }
}