{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ffb7ed19ac0a9fa9ea79af1d7b42c03a10da98a5"
            },
            {
              "fixed": "2d92fa0cdc02291de57f72170e8b60cef0cf5372"
            },
            {
              "fixed": "686cab5a18e443e1d5f2abb17bed45837836425f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39908.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dev_ioctl: take ops lock in hwtstamp lower paths\n\nndo hwtstamp callbacks are expected to run under the per-device ops\nlock. Make the lower get/set paths consistent with the rest of ndo\ninvocations.\n\nKernel log:\nWARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60\n...\nRIP: 0010:__netdev_update_features+0x4bd/0xe60\n...\nCall Trace:\n\u003cTASK\u003e\nnetdev_update_features+0x1f/0x60\nmlx5_hwtstamp_set+0x181/0x290 [mlx5_core]\nmlx5e_hwtstamp_set+0x19/0x30 [mlx5_core]\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp_phylib+0x9f/0x220\ndev_set_hwtstamp+0x13d/0x240\ndev_ioctl+0x12f/0x4b0\nsock_ioctl+0x171/0x370\n__x64_sys_ioctl+0x3f7/0x900\n? __sys_setsockopt+0x69/0xb0\ndo_syscall_64+0x6f/0x2e0\nentry_SYSCALL_64_after_hwframe+0x4b/0x53\n...\n\u003c/TASK\u003e\n....\n---[ end trace 0000000000000000 ]---\n\nNote that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown\nin the trace come from an in progress patch converting the legacy ioctl\nto ndo_hwtstamp_get/set and are not present in mainline.",
  "id": "CVE-2025-39908",
  "modified": "2026-04-01T23:08:53.472397041Z",
  "published": "2025-10-01T07:44:31.904Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d92fa0cdc02291de57f72170e8b60cef0cf5372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/686cab5a18e443e1d5f2abb17bed45837836425f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39908.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39908"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: dev_ioctl: take ops lock in hwtstamp lower paths"
}