Vulnerability-Lookup

GHSA-M5P4-PW2F-CH5C

Vulnerability from github – Published: 2026-08-10 12:31 – Updated: 2026-08-10 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush()

wacom_wac_queue_flush() is called via the .raw_event callback (wacom_raw_event → wacom_wac_pen_serial_enforce → wacom_wac_queue_flush). For USB HID devices, this callback is invoked from hid_irq_in(), which is a URB completion handler running in atomic context. Using GFP_KERNEL in this path can sleep, leading to a "scheduling while atomic" bug.

Use GFP_ATOMIC instead. The existing code already handles allocation failure by skipping the fifo entry and continuing.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68087"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T12:17:21Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush()\n\nwacom_wac_queue_flush() is called via the .raw_event callback\n(wacom_raw_event \u2192 wacom_wac_pen_serial_enforce \u2192 wacom_wac_queue_flush).\nFor USB HID devices, this callback is invoked from hid_irq_in(), which\nis a URB completion handler running in atomic context. Using GFP_KERNEL\nin this path can sleep, leading to a \"scheduling while atomic\" bug.\n\nUse GFP_ATOMIC instead. The existing code already handles allocation\nfailure by skipping the fifo entry and continuing.",
  "id": "GHSA-m5p4-pw2f-ch5c",
  "modified": "2026-08-10T12:31:55Z",
  "published": "2026-08-10T12:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68087"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27c4dad1b7917b747bf080792a527997e3147c69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55f1ad573e34abf9a0443c34bc5a63d74edba7d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68087 (GCVE-0-2026-68087)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:51 – Updated: 2026-08-17 04:58

Title

HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush()

Summary

In the Linux kernel, the following vulnerability has been resolved: HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush() wacom_wac_queue_flush() is called via the .raw_event callback (wacom_raw_event → wacom_wac_pen_serial_enforce → wacom_wac_queue_flush). For USB HID devices, this callback is invoked from hid_irq_in(), which is a URB completion handler running in atomic context. Using GFP_KERNEL in this path can sleep, leading to a "scheduling while atomic" bug. Use GFP_ATOMIC instead. The existing code already handles allocation failure by skipping the fifo entry and continuing.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/bbe1e55629bfaabd4…
https://git.kernel.org/stable/c/27c4dad1b7917b747…
https://git.kernel.org/stable/c/55f1ad573e34abf9a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5e013ad206895e72d7da41bc1ae89d8cb499c3aa , < bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b (git) Affected: 5e013ad206895e72d7da41bc1ae89d8cb499c3aa , < 27c4dad1b7917b747bf080792a527997e3147c69 (git) Affected: 5e013ad206895e72d7da41bc1ae89d8cb499c3aa , < 55f1ad573e34abf9a0443c34bc5a63d74edba7d7 (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_sys.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b",
              "status": "affected",
              "version": "5e013ad206895e72d7da41bc1ae89d8cb499c3aa",
              "versionType": "git"
            },
            {
              "lessThan": "27c4dad1b7917b747bf080792a527997e3147c69",
              "status": "affected",
              "version": "5e013ad206895e72d7da41bc1ae89d8cb499c3aa",
              "versionType": "git"
            },
            {
              "lessThan": "55f1ad573e34abf9a0443c34bc5a63d74edba7d7",
              "status": "affected",
              "version": "5e013ad206895e72d7da41bc1ae89d8cb499c3aa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/wacom_sys.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush()\n\nwacom_wac_queue_flush() is called via the .raw_event callback\n(wacom_raw_event \u2192 wacom_wac_pen_serial_enforce \u2192 wacom_wac_queue_flush).\nFor USB HID devices, this callback is invoked from hid_irq_in(), which\nis a URB completion handler running in atomic context. Using GFP_KERNEL\nin this path can sleep, leading to a \"scheduling while atomic\" bug.\n\nUse GFP_ATOMIC instead. The existing code already handles allocation\nfailure by skipping the fifo entry and continuing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:34.892Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/27c4dad1b7917b747bf080792a527997e3147c69"
        },
        {
          "url": "https://git.kernel.org/stable/c/55f1ad573e34abf9a0443c34bc5a63d74edba7d7"
        }
      ],
      "title": "HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68087",
    "datePublished": "2026-08-10T11:51:41.348Z",
    "dateReserved": "2026-07-30T09:28:09.367Z",
    "dateUpdated": "2026-08-17T04:58:34.892Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-M5P4-PW2F-CH5C

CVE-2026-68087 (GCVE-0-2026-68087)

Tags

Sightings

Nomenclature