{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "4f4001bc76fd1a138a501fbd3d68cce72cbf96ce"
            },
            {
              "fixed": "1f1bd9a3117f082eb891c0986c4f0e04cd974c9a"
            },
            {
              "fixed": "0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787"
            },
            {
              "fixed": "a0125ca86e405b8a704e96157a6c10ca51087652"
            },
            {
              "fixed": "5acb2dace582f061aab5e14c399ac9480315f44b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.13.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98859.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: stop the release timer from being rearmed on remove\n\nmt_remove() quiesces the sticky-finger timer before stopping the\nhardware:\n\n    timer_delete_sync(\u0026td-\u003erelease_timer);\n\n    sysfs_remove_group(\u0026hdev-\u003edev.kobj, \u0026mt_attribute_group);\n    hid_hw_stop(hdev);\n\ntimer_delete_sync() waits for a running callback and dequeues the timer,\nbut it does not stop the timer from being armed again. The transport is\nstill delivering reports at that point, and the report path rearms it:\n\n    if (app-\u003equirks \u0026 MT_QUIRK_STICKY_FINGERS) {\n        if (td-\u003emt_io_flags \u0026 MT_IO_SLOTS_MASK)\n            mod_timer(\u0026td-\u003erelease_timer,\n                      jiffies + msecs_to_jiffies(100));\n\nA report that arrives after timer_delete_sync() has returned therefore\nleaves the timer queued. td is allocated with devm_kzalloc() against\nhdev-\u003edev, so it is freed when the driver is unbound, after mt_remove()\nreturns. When the timer fires afterwards, mt_expired_timeout()\ndereferences the freed td:\n\n    struct mt_device *td = timer_container_of(td, t, release_timer);\n    struct hid_device *hdev = td-\u003ehdev;\n\n    if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, \u0026td-\u003emt_io_flags))\n\nSimply moving the teardown after hid_hw_stop() does not fix this on its\nown, because mt_expired_timeout() calls mt_release_contacts(), which\nwalks hdev-\u003einputs; the timer still has to be quiesced before\nhid_hw_stop() tears the input devices down.\n\nUse timer_shutdown_sync() instead, which additionally makes any later\nmod_timer() a no-op, so neither ordering constraint has to be traded off\nagainst the other. This is the final-teardown pattern the function was\nintroduced for, and hid-wiimote already uses it for the same reason.",
  "id": "CVE-2026-98859",
  "modified": "2026-10-19T02:30:54.351095066Z",
  "published": "2026-10-18T15:51:20.456Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f1bd9a3117f082eb891c0986c4f0e04cd974c9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5acb2dace582f061aab5e14c399ac9480315f44b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0125ca86e405b8a704e96157a6c10ca51087652"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98859.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98859"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "HID: multitouch: stop the release timer from being rearmed on remove"
}