{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "33a5c2793451770cb6dcf0cc35c76cfd4b045513"
            },
            {
              "fixed": "2bb6e7143cf70ed281822d26c1848b2897ac36e9"
            },
            {
              "fixed": "523db788c0f84612707638e266e8957ca7e3a756"
            },
            {
              "fixed": "17f5928d7010bc9e002930326b59e60e40c09ee3"
            },
            {
              "fixed": "3eca1a8165b5e7996e699e9df76cb4645e184d42"
            },
            {
              "fixed": "df3d8aa1a9392da3de66398e7a03422463806b21"
            },
            {
              "fixed": "46c8beeccd8ab2c863827254a85ea877654a3534"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.17.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64365.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: letsketch: fix UAF on inrange_timer at driver unbind\n\nletsketch_driver does not provide a .remove callback, but\nletsketch_probe() arms a per-device timer:\n\n    timer_setup(\u0026data-\u003einrange_timer, letsketch_inrange_timeout, 0);\n\nThe timer is re-armed from letsketch_raw_event() with a 100 ms\ntimeout on every pen-in-range report, and its callback dereferences\ndata-\u003einput_tablet to deliver a synthetic BTN_TOOL_PEN release.\n\nletsketch_data is allocated with devm_kzalloc(), and its input_dev\nfields are devm-allocated via letsketch_setup_input_tablet().  On\ndevice unbind (USB unplug or rmmod), the HID core runs its default\nteardown and devm cleanup frees both letsketch_data and the input\ndevices.  Because no .remove callback exists, nothing drains the\ntimer first: if raw_event armed it within ~100 ms of the unbind,\nthe pending timer fires on freed memory.  This is a UAF read of\ndata and of data-\u003einput_tablet, followed by input_report_key() /\ninput_sync() into the freed input_dev.\n\nThe same problem can occur on the probe error path: if\nhid_hw_start() enabled I/O on an always-poll-quirk device and then\nfailed, raw_event may have armed the timer before devm releases\ndata.\n\nFix by adding a .remove callback that calls hid_hw_stop() first.\nhid_hw_stop() synchronously kills the URBs that deliver raw_event(),\nso once it returns no path can re-arm the timer.  timer_shutdown_sync()\nthen drains any in-flight callback and permanently disables further\nmod_timer() calls.  Apply the same timer_shutdown_sync() in the probe\nerror path so the timer is guaranteed not to outlive data.",
  "id": "CVE-2026-64365",
  "modified": "2026-07-27T03:56:42.983186675Z",
  "published": "2026-07-25T08:50:20.039Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17f5928d7010bc9e002930326b59e60e40c09ee3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bb6e7143cf70ed281822d26c1848b2897ac36e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3eca1a8165b5e7996e699e9df76cb4645e184d42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46c8beeccd8ab2c863827254a85ea877654a3534"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/523db788c0f84612707638e266e8957ca7e3a756"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df3d8aa1a9392da3de66398e7a03422463806b21"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64365.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64365"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "HID: letsketch: fix UAF on inrange_timer at driver unbind"
}