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FKIE_CVE-2026-80782

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: do not keep a stale msc->input if no input is claimed magicmouse_input_mapping() caches the first hid_input's input_dev in msc->input while the report descriptor is parsed, and the rest of the driver treats a non-NULL msc->input as proof that an input device was registered. That does not hold on the hid-input error path. If hidinput_connect() fails -- for instance because input_register_device() returns an error -- it unwinds through hidinput_disconnect(), which frees every input_dev it created, including the one cached in msc->input. The failure does not abort the probe. hid_connect() only skips the claim: if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev, connect_mask & HID_CONNECT_HIDINPUT_FORCE)) hdev->claimed |= HID_CLAIMED_INPUT; and the "device has no listeners" bailout below it does not fire for this driver, which sets ->raw_event; on the USB Magic Mouse 2 / Magic Trackpad 2 paths hidraw and hiddev are claimed as well. hid_hw_start() therefore returns 0 and magicmouse_probe() continues with msc->input pointing at freed memory. Being non-NULL, it passes the "input not registered" check in probe and the NULL checks in ->raw_event and ->event, so the next input report dereferences freed memory. Clear msc->input when the HID core did not claim an input device, so the existing NULL checks cover this case as well.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0af3b89705688af01aa06025b84fa7a1e06ba6cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0bf253e9ac994cb5329bc87b00bb4eeca9136791
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/15b60ade825c8ce9ec560048a4ae3747e4572be3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ef16934e069d5f771e989d6ee5c3ece5042f3cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d7a7bac4c75f25b2513505a0ac5ba909588ed2b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9bdf8c7bfd79f1090e61d28f969b32880fd77bb3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3597923932bb90d4fc2186aef552f6677175e4a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0c224c93d10ee38854fdf24c815108aedd3dcb3
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-magicmouse.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c3597923932bb90d4fc2186aef552f6677175e4a",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "e0c224c93d10ee38854fdf24c815108aedd3dcb3",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "3d7a7bac4c75f25b2513505a0ac5ba909588ed2b",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "9bdf8c7bfd79f1090e61d28f969b32880fd77bb3",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "15b60ade825c8ce9ec560048a4ae3747e4572be3",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "0bf253e9ac994cb5329bc87b00bb4eeca9136791",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "2ef16934e069d5f771e989d6ee5c3ece5042f3cd",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "lessThan": "0af3b89705688af01aa06025b84fa7a1e06ba6cc",
              "status": "affected",
              "version": "f1a9a149abc86903e81dd1b2e720f3f89874384b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0e55072e7c63a6569cab1447e9025d160abd9dd9",
              "versionType": "git"
            },
            {
              "lessThan": "3.9",
              "status": "affected",
              "version": "3.8.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-magicmouse.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.9"
            },
            {
              "lessThan": "3.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.269",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: magicmouse: do not keep a stale msc-\u003einput if no input is claimed\n\nmagicmouse_input_mapping() caches the first hid_input\u0027s input_dev in\nmsc-\u003einput while the report descriptor is parsed, and the rest of the\ndriver treats a non-NULL msc-\u003einput as proof that an input device was\nregistered.\n\nThat does not hold on the hid-input error path. If hidinput_connect()\nfails -- for instance because input_register_device() returns an error --\nit unwinds through hidinput_disconnect(), which frees every input_dev it\ncreated, including the one cached in msc-\u003einput.\n\nThe failure does not abort the probe. hid_connect() only skips the claim:\n\n\tif ((connect_mask \u0026 HID_CONNECT_HIDINPUT) \u0026\u0026 !hidinput_connect(hdev,\n\t\t\t\tconnect_mask \u0026 HID_CONNECT_HIDINPUT_FORCE))\n\t\thdev-\u003eclaimed |= HID_CLAIMED_INPUT;\n\nand the \"device has no listeners\" bailout below it does not fire for this\ndriver, which sets -\u003eraw_event; on the USB Magic Mouse 2 / Magic Trackpad\n2 paths hidraw and hiddev are claimed as well. hid_hw_start() therefore\nreturns 0 and magicmouse_probe() continues with msc-\u003einput pointing at\nfreed memory. Being non-NULL, it passes the \"input not registered\" check\nin probe and the NULL checks in -\u003eraw_event and -\u003eevent, so the next\ninput report dereferences freed memory.\n\nClear msc-\u003einput when the HID core did not claim an input device, so the\nexisting NULL checks cover this case as well."
    }
  ],
  "id": "CVE-2026-80782",
  "lastModified": "2026-09-04T16:18:04.030",
  "metrics": {},
  "published": "2026-09-04T16:18:04.030",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0af3b89705688af01aa06025b84fa7a1e06ba6cc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0bf253e9ac994cb5329bc87b00bb4eeca9136791"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/15b60ade825c8ce9ec560048a4ae3747e4572be3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2ef16934e069d5f771e989d6ee5c3ece5042f3cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d7a7bac4c75f25b2513505a0ac5ba909588ed2b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9bdf8c7bfd79f1090e61d28f969b32880fd77bb3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3597923932bb90d4fc2186aef552f6677175e4a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e0c224c93d10ee38854fdf24c815108aedd3dcb3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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