{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4c975fd700022c90e61a46326e3444e08317876e"
            },
            {
              "fixed": "57a7ef338a2cd62a22a15a199ab9afd3d953df55"
            },
            {
              "fixed": "628e233c1fefcc227fae9bdcff6be8ac92e1b4d2"
            },
            {
              "fixed": "53898ebabe843bfa7baea9dae152797d5d0563c9"
            }
          ],
          "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-2025-39796.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lapbether: ignore ops-locked netdevs\n\nSyzkaller managed to trigger lock dependency in xsk_notify via\nregister_netdevice. As discussed in [0], using register_netdevice\nin the notifiers is problematic so skip adding lapbeth for ops-locked\ndevices.\n\n       xsk_notifier+0xa4/0x280 net/xdp/xsk.c:1645\n       notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n       call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\n       call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\n       call_netdevice_notifiers net/core/dev.c:2282 [inline]\n       unregister_netdevice_many_notify+0xf9d/0x2700 net/core/dev.c:12077\n       unregister_netdevice_many net/core/dev.c:12140 [inline]\n       unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984\n       register_netdevice+0x18f1/0x2270 net/core/dev.c:11149\n       lapbeth_new_device drivers/net/wan/lapbether.c:420 [inline]\n       lapbeth_device_event+0x5b1/0xbe0 drivers/net/wan/lapbether.c:462\n       notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n       call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\n       call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\n       call_netdevice_notifiers net/core/dev.c:2282 [inline]\n       __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9497\n       netif_change_flags+0x108/0x160 net/core/dev.c:9526\n       dev_change_flags+0xba/0x250 net/core/dev_api.c:68\n       devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1200\n       inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1001\n\n0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/",
  "id": "CVE-2025-39796",
  "modified": "2026-04-01T23:08:04.566376040Z",
  "published": "2025-09-12T15:59:32.871Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53898ebabe843bfa7baea9dae152797d5d0563c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57a7ef338a2cd62a22a15a199ab9afd3d953df55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/628e233c1fefcc227fae9bdcff6be8ac92e1b4d2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39796.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39796"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "net: lapbether: ignore ops-locked netdevs"
}