{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "01309e29eb95c16bd48984f2589fad0cbf5e27d1"
            },
            {
              "fixed": "f40243358b407aec362fe305fabfcdc94a3abd89"
            },
            {
              "fixed": "dc5108f18f58870a8dd4203a02a47e571a2be7f0"
            },
            {
              "fixed": "9d77ac82e57ead056cf3f71d347083ed9244ad90"
            },
            {
              "fixed": "e750cdb6de009aace3c77f37fe2173f96175e8e4"
            },
            {
              "fixed": "849e537160bbb77fe419ecc3944bfe125dcd441b"
            },
            {
              "fixed": "f1b3ca06380531f49f988f4721d3ed30b0d7a5d2"
            },
            {
              "fixed": "f13d0a00204b05e62336da0ab72ea0d87b56690c"
            },
            {
              "fixed": "506fd50a9027340f0e9dcc587d10ccb03312dba6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.1.0"
            },
            {
              "fixed": "5.15.220"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.187"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.156"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.108"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80766.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: uclogic: fix use-after-free of inrange_timer on remove\n\nuclogic_remove() cancels the pen in-range timer and then stops the\ndevice:\n\n\ttimer_delete_sync(\u0026drvdata-\u003einrange_timer);\n\thid_hw_stop(hdev);\n\ntimer_delete_sync() only guarantees the timer is idle at that instant.\nuclogic_raw_event_pen() keeps delivering pen reports until hid_hw_stop()\nstops the transport several lines later, and every report with\npen-\u003einrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE re-arms the timer:\n\n\tmod_timer(\u0026drvdata-\u003einrange_timer, jiffies + msecs_to_jiffies(100));\n\nA report landing between the timer_delete_sync() call and the transport\nteardown in hid_hw_stop() re-arms inrange_timer after it was cancelled.\nuclogic_remove() then returns and the devm drvdata is freed, while\nhid_hw_stop() has already freed the input device drvdata-\u003epen_input\npoints at, so when the timer fires ~100 ms later\nuclogic_inrange_timeout() dereferences freed memory -- a use-after-free\nin timer-softirq context.\n\nSwapping the two calls is not a fix: stopping the device first frees\ndrvdata-\u003epen_input via hidinput_disconnect() while the timer may still\nbe pending, so a timer already armed before removal fires on the freed\ninput device in the window before timer_delete_sync() runs.\n\nUse timer_shutdown_sync() before hid_hw_stop() instead. It cancels the\ntimer, waits for a running callback while pen_input is still valid, and\nprevents any further re-arming -- a later mod_timer() from an in-flight\nreport is silently ignored -- so the timer is provably dead before\nhid_hw_stop() frees the inputs. This is the ordering the timer core\ndocuments for this \"timer re-armed from another path\" teardown case.",
  "id": "CVE-2026-80766",
  "modified": "2026-09-06T03:30:37.357277434Z",
  "published": "2026-09-04T15:12:38.520Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/506fd50a9027340f0e9dcc587d10ccb03312dba6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/849e537160bbb77fe419ecc3944bfe125dcd441b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d77ac82e57ead056cf3f71d347083ed9244ad90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc5108f18f58870a8dd4203a02a47e571a2be7f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e750cdb6de009aace3c77f37fe2173f96175e8e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f13d0a00204b05e62336da0ab72ea0d87b56690c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1b3ca06380531f49f988f4721d3ed30b0d7a5d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f40243358b407aec362fe305fabfcdc94a3abd89"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80766.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80766"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "HID: uclogic: fix use-after-free of inrange_timer on remove"
}