{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-40347",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-40347"
  ],
  "published": "2025-12-16T13:30:44Z",
  "summary": "net: enetc: fix the deadlock of enetc_mdio_lock",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: fix the deadlock of enetc_mdio_lock\n\nAfter applying the workaround for err050089, the LS1028A platform\nexperiences RCU stalls on RT kernel. This issue is caused by the\nrecursive acquisition of the read lock enetc_mdio_lock. Here list some\nof the call stacks identified under the enetc_poll path that may lead to\na deadlock:\n\nenetc_poll\n  -> enetc_lock_mdio\n  -> enetc_clean_rx_ring OR napi_complete_done\n     -> napi_gro_receive\n        -> enetc_start_xmit\n           -> enetc_lock_mdio\n           -> enetc_map_tx_buffs\n           -> enetc_unlock_mdio\n  -> enetc_unlock_mdio\n\nAfter enetc_poll acquires the read lock, a higher-priority writer attempts\nto acquire the lock, causing preemption. The writer detects that a\nread lock is already held and is scheduled out. However, readers under\nenetc_poll cannot acquire the read lock again because a writer is already\nwaiting, leading to a thread hang.\n\nCurrently, the deadlock is avoided by adjusting enetc_lock_mdio to prevent\nrecursive lock acquisition.",
  "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": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40347"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a649161526736f48bcc592e3a412e5bcd7dd9e24"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2781ca82ce8cad263d80b617addb727e6a84c9e5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1f92f5bd057a4fad9dab6af17963cdd21e5da6ed"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/50bd33f6b3922a6b760aa30d409cae891cec8fb5"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}