qede: sync udp_tunnel ports outside qede_lock in the recovery path

{
  "id": "47183885d319bfb00f6ea10a14eefad30de02adb154eedd9eb3079d35e81e34c",
  "url": "https://osv.dev/vulnerability/CVE-2026-74523",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "qede: sync udp_tunnel ports outside qede_lock in the recovery path",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: qede: sync udp_tunnel ports outside qede_lock in the recovery path A TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports configured wedges the rtnetlink control plane of the whole machine: NETDEV WATCHDOG: ens6f1 (qede): transmit queue 2 timed out 10226 ms [qede_tx_timeout:586(ens6f1)]TX timeout on queue 2! [qede_recovery_handler:2665(ens6f0)]Starting a recovery process The recovery path deadlocks on the driver's own mutex: qede_sp_task rtnl_lock() mutex_lock(&edev->qede_lock) <- taken qede_recovery_handler qede_load udp_tunnel_nic_reset_ntf __udp_tunnel_nic_device_sync info->sync_table == qede_udp_tunnel_sync mutex_lock(&edev->qede_lock) <- same task: deadlock The mutex is not recursive, so the kworker blocks on itself with rtnl_lock held, and neither lock is ever released. Every task that calls rtnl_lock() afterwards (ip, ovs-vswitchd, lldpad, IPv6 addrconf, sshd) blocks forever while the node still answers ping. In a vmcore from an affected production node rtnl_mutex.owner decodes to the very kworker blocked at the innermost mutex_lock() above. Re-sync the tunnel ports from qede_sp_task() after the internal lock is dropped, still under rtnl_lock as the udp_tunnel API requires. This mirrors qede_open(), which calls udp_tunnel_nic_reset_ntf() under rtnl without the internal lock. qede_recovery_handler() now returns whether it has successfully reloaded an open device, and the caller re-syncs the ports",
    "evidence": "osv:CVE-2026-74523",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.265",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-74523",
      "aliases": [
        "CVE-2026-74523"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
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      "modified": "2026-10-28T02:30:42.229299290Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/19e505ee8bb9e0f0355eda9e9f614fb25fed0070",
        "https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567",
        "https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae",
        "https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27",
        "https://git.kernel.org/stable/c/8e1bdf57de91247e57816482966265ada573cc74",
        "https://git.kernel.org/stable/c/c4c1e5d6bc2b900b2328d6fff93dc8146b858d69",
        "https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b",
        "https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74523.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74523",
        "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/2026/74xxx/CVE-2026-74523.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74523",
        "evidence": "/id"
      }
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510103,
  "published_at": "2026-08-15T12:27:40.575+00:00"
}