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CVE-2026-80766 (GCVE-0-2026-80766)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12
VLAI
Title
HID: uclogic: fix use-after-free of inrange_timer on remove
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: uclogic: fix use-after-free of inrange_timer on remove uclogic_remove() cancels the pen in-range timer and then stops the device: timer_delete_sync(&drvdata->inrange_timer); hid_hw_stop(hdev); timer_delete_sync() only guarantees the timer is idle at that instant. uclogic_raw_event_pen() keeps delivering pen reports until hid_hw_stop() stops the transport several lines later, and every report with pen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE re-arms the timer: mod_timer(&drvdata->inrange_timer, jiffies + msecs_to_jiffies(100)); A report landing between the timer_delete_sync() call and the transport teardown in hid_hw_stop() re-arms inrange_timer after it was cancelled. uclogic_remove() then returns and the devm drvdata is freed, while hid_hw_stop() has already freed the input device drvdata->pen_input points at, so when the timer fires ~100 ms later uclogic_inrange_timeout() dereferences freed memory -- a use-after-free in timer-softirq context. Swapping the two calls is not a fix: stopping the device first frees drvdata->pen_input via hidinput_disconnect() while the timer may still be pending, so a timer already armed before removal fires on the freed input device in the window before timer_delete_sync() runs. Use timer_shutdown_sync() before hid_hw_stop() instead. It cancels the timer, waits for a running callback while pen_input is still valid, and prevents any further re-arming -- a later mod_timer() from an in-flight report is silently ignored -- so the timer is provably dead before hid_hw_stop() frees the inputs. This is the ordering the timer core documents for this "timer re-armed from another path" teardown case.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < f40243358b407aec362fe305fabfcdc94a3abd89 (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < dc5108f18f58870a8dd4203a02a47e571a2be7f0 (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < 9d77ac82e57ead056cf3f71d347083ed9244ad90 (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < e750cdb6de009aace3c77f37fe2173f96175e8e4 (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < 849e537160bbb77fe419ecc3944bfe125dcd441b (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < f1b3ca06380531f49f988f4721d3ed30b0d7a5d2 (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < f13d0a00204b05e62336da0ab72ea0d87b56690c (git)
Affected: 01309e29eb95c16bd48984f2589fad0cbf5e27d1 , < 506fd50a9027340f0e9dcc587d10ccb03312dba6 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.15.220 , ≤ 5.15.* (semver)
Unaffected: 6.1.187 , ≤ 6.1.* (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:38.520Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f40243358b407aec362fe305fabfcdc94a3abd89"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc5108f18f58870a8dd4203a02a47e571a2be7f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d77ac82e57ead056cf3f71d347083ed9244ad90"
        },
        {
          "url": "https://git.kernel.org/stable/c/e750cdb6de009aace3c77f37fe2173f96175e8e4"
        },
        {
          "url": "https://git.kernel.org/stable/c/849e537160bbb77fe419ecc3944bfe125dcd441b"
        },
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          "url": "https://git.kernel.org/stable/c/f1b3ca06380531f49f988f4721d3ed30b0d7a5d2"
        },
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          "url": "https://git.kernel.org/stable/c/f13d0a00204b05e62336da0ab72ea0d87b56690c"
        },
        {
          "url": "https://git.kernel.org/stable/c/506fd50a9027340f0e9dcc587d10ccb03312dba6"
        }
      ],
      "title": "HID: uclogic: fix use-after-free of inrange_timer on remove",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80766",
    "datePublished": "2026-09-04T15:12:38.520Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-09-04T15:12:38.520Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-80766",
      "id": "msrc_CVE-2026-80766",
      "initial_release_date": "2026-09-06T04:58:03.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "HID: uclogic: fix use-after-free of inrange_timer on remove",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80766.json",
      "version": "2"
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/hid/hid-uclogic-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"f40243358b407aec362fe305fabfcdc94a3abd89\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"dc5108f18f58870a8dd4203a02a47e571a2be7f0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"9d77ac82e57ead056cf3f71d347083ed9244ad90\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"e750cdb6de009aace3c77f37fe2173f96175e8e4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"849e537160bbb77fe419ecc3944bfe125dcd441b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"f1b3ca06380531f49f988f4721d3ed30b0d7a5d2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"f13d0a00204b05e62336da0ab72ea0d87b56690c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\"lessThan\":\"506fd50a9027340f0e9dcc587d10ccb03312dba6\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/hid/hid-uclogic-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.220\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.187\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.156\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.108\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/506fd50a9027340f0e9dcc587d10ccb03312dba6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/849e537160bbb77fe419ecc3944bfe125dcd441b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d77ac82e57ead056cf3f71d347083ed9244ad90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dc5108f18f58870a8dd4203a02a47e571a2be7f0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e750cdb6de009aace3c77f37fe2173f96175e8e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f13d0a00204b05e62336da0ab72ea0d87b56690c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1b3ca06380531f49f988f4721d3ed30b0d7a5d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f40243358b407aec362fe305fabfcdc94a3abd89\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T01:52:01Z",
      "cve": "CVE-2026-80766",
      "id": "CVE-2026-80766",
      "initial_release_date": "2026-09-07T16:20:04Z",
      "product_status:known_affected": "248",
      "product_status:known_not_affected": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80766",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80766.json",
      "version": "3"
    }
  }
}



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