{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74523",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74523"
  ],
  "published": "2026-08-15T12:28:42Z",
  "summary": "qede: sync udp_tunnel ports outside qede_lock in the recovery path",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nqede: sync udp_tunnel ports outside qede_lock in the recovery path\n\nA TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports\nconfigured wedges the rtnetlink control plane of the whole machine:\n\n  NETDEV WATCHDOG: ens6f1 (qede): transmit queue 2 timed out 10226 ms\n  [qede_tx_timeout:586(ens6f1)]TX timeout on queue 2!\n  [qede_recovery_handler:2665(ens6f0)]Starting a recovery process\n\nThe recovery path deadlocks on the driver's own mutex:\n\n  qede_sp_task\n   rtnl_lock()\n   mutex_lock(&edev->qede_lock)        <- taken\n   qede_recovery_handler\n    qede_load\n    udp_tunnel_nic_reset_ntf\n     __udp_tunnel_nic_device_sync\n      info->sync_table == qede_udp_tunnel_sync\n       mutex_lock(&edev->qede_lock)    <- same task: deadlock\n\nThe mutex is not recursive, so the kworker blocks on itself with\nrtnl_lock held, and neither lock is ever released. Every task that\ncalls rtnl_lock() afterwards (ip, ovs-vswitchd, lldpad, IPv6\naddrconf, sshd) blocks forever while the node still answers ping.\nIn a vmcore from an affected production node rtnl_mutex.owner\ndecodes to the very kworker blocked at the innermost mutex_lock()\nabove.\n\nRe-sync the tunnel ports from qede_sp_task() after the internal lock\nis dropped, still under rtnl_lock as the udp_tunnel API requires.\nThis mirrors qede_open(), which calls udp_tunnel_nic_reset_ntf()\nunder rtnl without the internal lock.\n\nqede_recovery_handler() now returns whether it has successfully\nreloaded an open device, and the caller re-syncs the ports only in\nthat case. This keeps the old gating exactly: a device that was down\nor a failed recovery returns false, as those paths never reached the\nudp_tunnel_nic_reset_ntf() call before either.\n\nThis was the only user of the qede_lock()/qede_unlock() helpers, so\nremove them.",
  "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": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74523"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/19e505ee8bb9e0f0355eda9e9f614fb25fed0070"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c4c1e5d6bc2b900b2328d6fff93dc8146b858d69"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8e1bdf57de91247e57816482966265ada573cc74"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e382a4efeeae6555b95d9ff336cf3094ee7d336b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4626df3f63c9185efba5750fe76ac01ab3351bae"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e51becb8f3377a377171ed5bf0082b96e22e6292"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6f1ef8170d3d8ad9319aa01347945dcdf5cc4f27"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/451c9075d6c53f2438d110addbeeeea6fac18567"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}