drop_monitor: fix incorrect initialization order

{
  "id": "685652c98a3e751148df0544a4a65aa752e808bc9e4ebe85f5ba598af9feed21",
  "url": "https://osv.dev/vulnerability/CVE-2025-21862",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drop_monitor: fix incorrect initialization order",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drop_monitor: fix incorrect initialization order Syzkaller reports the following bug: BUG: spinlock bad magic on CPU#1, syz-executor.0/7995 lock: 0xffff88805303f3e0, .magic: 00000000, .owner: /-1, .owner_cpu: 0 CPU: 1 PID: 7995 Comm: syz-executor.0 Tainted: G E 5.10.209+ #1 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x119/0x179 lib/dump_stack.c:118 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x1f6/0x270 kernel/locking/spinlock_debug.c:112 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0x50/0x70 kernel/locking/spinlock.c:159 reset_per_cpu_data+0xe6/0x240 [drop_monitor] net_dm_cmd_trace+0x43d/0x17a0 [drop_monitor] genl_family_rcv_msg_doit+0x22f/0x330 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x341/0x5a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x14d/0x440 net/netlink/af_netlink.c:2497 genl_rcv+0x29/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x54b/0x800 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x914/0xe00 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:651 [inline] __sock_sendmsg+0x157/0x190 net/socket.c:663 ____sys_sendmsg+0x712/0x870 net/socket.c:2378 ___s",
    "evidence": "osv:CVE-2025-21862",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.291",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.235",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.179",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21862",
      "aliases": [
        "CVE-2025-21862"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9a8afc8d3962f3ed26fd6b56db34133860ed1e72"
                },
                {
                  "fixed": "6e9e0f224ffd8b819da3ea247dda404795fdd182"
                },
                {
                  "fixed": "29f9cdcab3d96d5207a5c92b52c40ad75e5915d8"
                },
                {
                  "fixed": "872c7c7e57a746046796ddfead529c9d37b9f6b4"
                },
                {
                  "fixed": "fcfc00bfec7bb6661074cb21356d05a4c9470a3c"
                },
                {
                  "fixed": "0efa6c42f81c60d8f72ba7f5ed8d4fec8c526282"
                },
                {
                  "fixed": "b7859e8643e75619b2705b4fcac93ffd94d72b4a"
                },
                {
                  "fixed": "219a47d0e6195bd202f22855e35f25bd15bc4d58"
                },
                {
                  "fixed": "07b598c0e6f06a0f254c88dafb4ad50f8a8c6eea"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21862.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.30"
                },
                {
                  "fixed": "5.4.291"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.235"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.179"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.130"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.80"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.17"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21862.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.944330632Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-082556.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/07b598c0e6f06a0f254c88dafb4ad50f8a8c6eea",
        "https://git.kernel.org/stable/c/0efa6c42f81c60d8f72ba7f5ed8d4fec8c526282",
        "https://git.kernel.org/stable/c/219a47d0e6195bd202f22855e35f25bd15bc4d58",
        "https://git.kernel.org/stable/c/29f9cdcab3d96d5207a5c92b52c40ad75e5915d8",
        "https://git.kernel.org/stable/c/6e9e0f224ffd8b819da3ea247dda404795fdd182",
        "https://git.kernel.org/stable/c/872c7c7e57a746046796ddfead529c9d37b9f6b4",
        "https://git.kernel.org/stable/c/b7859e8643e75619b2705b4fcac93ffd94d72b4a",
        "https://git.kernel.org/stable/c/fcfc00bfec7bb6661074cb21356d05a4c9470a3c",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21862.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21862",
        "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/2025/21xxx/CVE-2025-21862.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21862",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507417,
  "published_at": "2025-03-12T09:42:19.881+00:00"
}