HID: core: remove unnecessary WARN_ON() in implement()

{
  "id": "50c2e7dde6a39aa448c43e9c3c6d60393e730ad2a0bbad37da1e94b8806e3055",
  "url": "https://osv.dev/vulnerability/CVE-2024-39509",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "HID: core: remove unnecessary WARN_ON() in implement()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: HID: core: remove unnecessary WARN_ON() in implement() Syzkaller hit a warning [1] in a call to implement() when trying to write a value into a field of smaller size in an output report. Since implement() already has a warn message printed out with the help of hid_warn() and value in question gets trimmed with: ... value &= m; ... WARN_ON may be considered superfluous. Remove it to suppress future syzkaller triggers. [1] WARNING: CPU: 0 PID: 5084 at drivers/hid/hid-core.c:1451 implement drivers/hid/hid-core.c:1451 [inline] WARNING: CPU: 0 PID: 5084 at drivers/hid/hid-core.c:1451 hid_output_report+0x548/0x760 drivers/hid/hid-core.c:1863 Modules linked in: CPU: 0 PID: 5084 Comm: syz-executor424 Not tainted 6.9.0-rc7-syzkaller-00183-gcf87f46fd34d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:implement drivers/hid/hid-core.c:1451 [inline] RIP: 0010:hid_output_report+0x548/0x760 drivers/hid/hid-core.c:1863 ... Call Trace: __usbhid_submit_report drivers/hid/usbhid/hid-core.c:591 [inline] usbhid_submit_report+0x43d/0x9e0 drivers/hid/usbhid/hid-core.c:636 hiddev_ioctl+0x138b/0x1f00 drivers/hid/usbhid/hiddev.c:726 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/",
    "evidence": "osv:CVE-2024-39509",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
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      "aliases": [
        "CVE-2024-39509"
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            "ecosystem": "Linux"
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      "modified": "2026-10-28T02:30:37.437028950Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-355557.html",
        "https://git.kernel.org/stable/c/30f76bc468b9b2cbbd5d3eb482661e3e4798893f",
        "https://git.kernel.org/stable/c/33f6832798dd3297317901cc1db556ac3ae80c24",
        "https://git.kernel.org/stable/c/4aa2dcfbad538adf7becd0034a3754e1bd01b2b5",
        "https://git.kernel.org/stable/c/655c6de2f215b61d0708db6b06305eee9bbfeba2",
        "https://git.kernel.org/stable/c/8bac61934cd563b073cd30b8cf6d5c758ab5ab26",
        "https://git.kernel.org/stable/c/955b3764671f3f157215194972d9c01a3a4bd316",
        "https://git.kernel.org/stable/c/bfd546fc7fd76076f81bf41b85b51ceda30949fd",
        "https://git.kernel.org/stable/c/f9db5fbeffb951cac3f0fb1c2eeffb79785399ca",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39509.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-39509",
        "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/2024/39xxx/CVE-2024-39509.json"
      }
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    "related_cves": [
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        "value": "CVE-2024-39509",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504567,
  "published_at": "2024-07-12T12:20:40.257+00:00"
}