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CVE-2026-64338 (GCVE-0-2026-64338)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:53
VLAI
Title
USB: misc: uss720: unregister parport on probe failure
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: misc: uss720: unregister parport on probe failure uss720_probe() registers a parport before reading the 1284 register used to detect unsupported Belkin F5U002 adapters. If get_1284_register() fails, the error path drops the driver private data and the USB device reference, but leaves the parport device registered. Leaving the port registered is more than a private allocation leak: parport_register_port() has already reserved a parport number and registered the parport bus device, while pp->private_data still points at the private data that the common error path is about to release. Undo the pre-announce registration in the get_1284_register() failure branch before jumping to the common private-data cleanup path. Clear priv->pp first, matching the disconnect path and avoiding a stale pointer in the private data. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 04736c1bc32197f7d859e01a96ae80a16659931d , < 6bbb98bec71b577fda4f4b48f7aea5874b04a576 (git)
Affected: 4eaf2331a77996bbbaf2b824d452ac8ebda7e6e7 , < 93563243377f8e9b46cc94d9c4f06533dd31b141 (git)
Affected: 8fc246a8a456679993df565d3c9e3da28030ee43 , < 1712fd71a5aaf81e47c747f180535fa963ad7830 (git)
Affected: 10132ccf99f49b43aeb7470df50d72344a601ad6 , < 0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea (git)
Affected: 3295f1b866bfbcabd625511968e8a5c541f9ab32 , < 5e62d7857fd51b908b8371062ee839739a086bbe (git)
Affected: 3295f1b866bfbcabd625511968e8a5c541f9ab32 , < 729b68a5bad71220ae0914c8bdab9488ad5be6c8 (git)
Affected: 3295f1b866bfbcabd625511968e8a5c541f9ab32 , < 48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e (git)
Affected: 3295f1b866bfbcabd625511968e8a5c541f9ab32 , < b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3 (git)
Affected: 02d13616ca30014ed96302e51a5b0e17664e58bc (git)
Affected: dff3b01e91a3df93063b03d0f8dd5c40546687ec (git)
Affected: 489d77fbd66375972a380d207f7eb39b00c4a67b (git)
Affected: 5.10.221 , < 5.10.261 (semver)
Affected: 5.15.162 , < 5.15.212 (semver)
Affected: 6.1.96 , < 6.1.178 (semver)
Affected: 6.6.36 , < 6.6.145 (semver)
Affected: 4.19.317 , < 4.20 (semver)
Affected: 5.4.279 , < 5.5 (semver)
Affected: 6.9.7 , < 6.10 (semver)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  },
                  {
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                  {
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                    "versionStartIncluding": "6.19",
                    "vulnerable": true
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                  {
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                    "matchCriteriaId": "5E8B9085-7ADB-4A05-89EF-12949B6A0509",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "1FC0D50D-9D58-4947-A197-A5A3FF07E7E3",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: misc: uss720: unregister parport on probe failure\n\nuss720_probe() registers a parport before reading the 1284 register used\nto detect unsupported Belkin F5U002 adapters. If get_1284_register()\nfails, the error path drops the driver private data and the USB device\nreference, but leaves the parport device registered.\n\nLeaving the port registered is more than a private allocation leak:\nparport_register_port() has already reserved a parport number and\nregistered the parport bus device, while pp-\u003eprivate_data still points at\nthe private data that the common error path is about to release.\n\nUndo the pre-announce registration in the get_1284_register() failure\nbranch before jumping to the common private-data cleanup path. Clear\npriv-\u003epp first, matching the disconnect path and avoiding a stale pointer\nin the private data.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."
          }
        ],
        "id": "CVE-2026-64338",
        "lastModified": "2026-09-03T16:02:08.260",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-07-25T10:17:15.717",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1712fd71a5aaf81e47c747f180535fa963ad7830"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5e62d7857fd51b908b8371062ee839739a086bbe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6bbb98bec71b577fda4f4b48f7aea5874b04a576"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/729b68a5bad71220ae0914c8bdab9488ad5be6c8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/93563243377f8e9b46cc94d9c4f06533dd31b141"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-03T16:48:03+00:00",
      "cve": "CVE-2026-64338",
      "id": "CVE-2026-64338",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: USB: misc: uss720: unregister parport on probe failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64338.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:41:35Z",
      "cve": "CVE-2026-64338",
      "id": "CVE-2026-64338",
      "initial_release_date": "2026-07-25T16:01:31Z",
      "product_status:known_affected": "482",
      "product_status:known_not_affected": "268",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64338",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64338.json",
      "version": "10"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.