CVE-2026-68091 (GCVE-0-2026-68091)
Vulnerability from cvelistv5
Published
2026-08-10 11:51
Modified
2026-08-17 04:58
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: wacom: stop hardware after post-start probe failures wacom_parse_and_register() starts HID hardware before registering inputs and initializing pad LEDs/remotes. Those later steps can fail, but their error paths currently release Wacom resources without stopping the HID hardware. Route post-hid_hw_start() failures through hid_hw_stop() before releasing driver resources. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
References
Impacted products
Vendor Product Version
Linux Linux Version: f304eb483393f135ab479d02da6f5dc7d9b51cd6
Version: 853307924a9003b3142b5253b1caa6625fbad9fc
Version: e5c6c8ef3e4d3a88407404daafbf2c6be62f2185
Version: fc41101a94b11cd0d5ad8e213b2b6965f248d653
Version: c1d6708bf0d3dd976460d435373cf5abf21ce258
Version: c1d6708bf0d3dd976460d435373cf5abf21ce258
Version: c1d6708bf0d3dd976460d435373cf5abf21ce258
Version: c1d6708bf0d3dd976460d435373cf5abf21ce258
Version: d943536197c1a05e377452af4ec7942e11d018f4
Version: dbaca8fa9ec2c5aa55ec515686ce3b9007554eab
Version: 79187e8099a9feb550916dbfb962497522022b6d
Version: 5.10.210   ≤
Version: 5.15.149   ≤
Version: 6.1.79   ≤
Version: 6.6.18   ≤
Version: 4.19.307   ≤
Version: 5.4.269   ≤
Version: 6.7.6   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: stop hardware after post-start probe failures\n\nwacom_parse_and_register() starts HID hardware before registering inputs\nand initializing pad LEDs/remotes. Those later steps can fail, but their\nerror paths currently release Wacom resources without stopping the HID\nhardware.\n\nRoute post-hid_hw_start() failures through hid_hw_stop() before\nreleasing driver resources.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The flaw is in the Wacom HID driver probe path reached when a Wacom-class HID device is connected; Bluetooth Wacom tablets are widely deployed and let an adjacent attacker deliver crafted HID traffic without USB port access.\nAC:L - A malicious or fuzzed Wacom HID device can steer probe through post-hid_hw_start() failure paths and the scheduled init_work, reliably leaving HID hardware active after driver teardown.\nPR:N - Exploitation requires only presenting a rogue Wacom HID device over Bluetooth or USB; no prior local account, capability, or namespace privilege on the victim host is needed.\nUI:N - No victim interaction is required beyond the attacker initiating device connection; probe failure and continued HID activity occur automatically on the kernel hotplug path.\nS:U - Impact is kernel memory corruption and privilege escalation within the host kernel, not crossing a VM, container, or IOMMU security boundary.\nC:H - Continued HID callbacks and delayed work after wacom_release_resources() create a use-after-free on freed driver allocations, enabling arbitrary kernel memory disclosure.\nI:H - The dangling hardware/workqueue activity against freed Wacom state is a heap use-after-free that can be leveraged for arbitrary kernel writes and code execution.\nA:H - Accessing freed probe resources from still-running HID hardware or init_work can cause kernel oops, panic, or hang, producing complete system denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:39.275Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5a7ca028facf04921b2c1c2e4d1ee7f282510555"
        },
        {
          "url": "https://git.kernel.org/stable/c/3e6473a4f0596182acdda5219b4bebfbee76514f"
        },
        {
          "url": "https://git.kernel.org/stable/c/46d8b8c85ae0589fb85746a64e8908160e52aac3"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a1ebdcb56ae58a0ee2c54dd15d75121e30424e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/75eb2173b63ab41c24d80cd641af18f3c117a267"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ec2612b8ad9e642596db011dd8b6568ef1edeaa1"
        }
      ],
      "title": "HID: wacom: stop hardware after post-start probe failures",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68091",
    "datePublished": "2026-08-10T11:51:46.683Z",
    "dateReserved": "2026-07-30T09:28:09.367Z",
    "dateUpdated": "2026-08-17T04:58:39.275Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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