CVE-2025-21689 (GCVE-0-2025-21689)

Vulnerability from cvelistv5 – Published: 2025-02-10 15:58 – Updated: 2026-05-11 21:04
VLAI
Title
USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb() This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following: if (newport > serial->num_ports) { dev_err(&port->dev, "%s - port change to invalid port: %i\n", __func__, newport); break; } The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:51 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7056 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < fa4c7472469d97c4707698b4c0e098f8cfc2bf22 (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 94770cf7c5124f0268d481886829dc2beecc4507 (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 4b9b41fabcd38990f69ef0cee9c631d954a2b530 (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 6377838560c03b36e1153a42ef727533def9b68f (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < f371471708c7d997f763b0e70565026eb67cc470 (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 8542b33622571f54dfc2a267fce378b6e3840b8b (git)
Affected: f7a33e608d9ae022b7f49307921627e34e9484ed , < 575a5adf48b06a2980c9eeffedf699ed5534fade (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 5.4.290 , ≤ 5.4.* (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.178 , ≤ 5.15.* (semver)
Unaffected: 6.1.128 , ≤ 6.1.* (semver)
Unaffected: 6.6.75 , ≤ 6.6.* (semver)
Unaffected: 6.12.12 , ≤ 6.12.* (semver)
Unaffected: 6.13.1 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21689",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:51:31.131902Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:57:10.344Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:59:10.756Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/quatech2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fa4c7472469d97c4707698b4c0e098f8cfc2bf22",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "94770cf7c5124f0268d481886829dc2beecc4507",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "4b9b41fabcd38990f69ef0cee9c631d954a2b530",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "6377838560c03b36e1153a42ef727533def9b68f",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "f371471708c7d997f763b0e70565026eb67cc470",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "8542b33622571f54dfc2a267fce378b6e3840b8b",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            },
            {
              "lessThan": "575a5adf48b06a2980c9eeffedf699ed5534fade",
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/quatech2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "lessThan": "3.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.290",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.234",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.290",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.234",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.178",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.128",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.75",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.12",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.1",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()\n\nThis patch addresses a null-ptr-deref in qt2_process_read_urb() due to\nan incorrect bounds check in the following:\n\n       if (newport \u003e serial-\u003enum_ports) {\n               dev_err(\u0026port-\u003edev,\n                       \"%s - port change to invalid port: %i\\n\",\n                       __func__, newport);\n               break;\n       }\n\nThe condition doesn\u0027t account for the valid range of the serial-\u003eport\nbuffer, which is from 0 to serial-\u003enum_ports - 1. When newport is equal\nto serial-\u003enum_ports, the assignment of \"port\" in the\nfollowing code is out-of-bounds and NULL:\n\n       serial_priv-\u003ecurrent_port = newport;\n       port = serial-\u003eport[serial_priv-\u003ecurrent_port];\n\nThe fix checks if newport is greater than or equal to serial-\u003enum_ports\nindicating it is out-of-bounds."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:04:31.416Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22"
        },
        {
          "url": "https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507"
        },
        {
          "url": "https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530"
        },
        {
          "url": "https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470"
        },
        {
          "url": "https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade"
        }
      ],
      "title": "USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21689",
    "datePublished": "2025-02-10T15:58:45.493Z",
    "dateReserved": "2024-12-29T08:45:45.741Z",
    "dateUpdated": "2026-05-11T21:04:31.416Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21689",
      "date": "2026-10-25",
      "epss": "0.00226",
      "percentile": "0.13142"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-19T01:24:33.000Z",
      "cve": "CVE-2025-21689",
      "id": "msrc_CVE-2025-21689",
      "initial_release_date": "2025-02-02T00:00:00.000Z",
      "product_status:known_not_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-21689.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/usb/serial/quatech2.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "fa4c7472469d97c4707698b4c0e098f8cfc2bf22",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "94770cf7c5124f0268d481886829dc2beecc4507",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4b9b41fabcd38990f69ef0cee9c631d954a2b530",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6377838560c03b36e1153a42ef727533def9b68f",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f371471708c7d997f763b0e70565026eb67cc470",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "8542b33622571f54dfc2a267fce378b6e3840b8b",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "575a5adf48b06a2980c9eeffedf699ed5534fade",
                    "status": "affected",
                    "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/usb/serial/quatech2.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.5"
                  },
                  {
                    "lessThan": "3.5",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.4.*",
                    "status": "unaffected",
                    "version": "5.4.290",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.234",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.178",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.128",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.75",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.12",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.13.*",
                    "status": "unaffected",
                    "version": "6.13.1",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.14",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C332DF00-BEC8-45B0-8795-4706DA6CBD65",
                    "versionEndExcluding": "5.4.290",
                    "versionStartIncluding": "3.5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F732162B-ED7E-4367-A5C2-B24FD9B0D33B",
                    "versionEndExcluding": "5.10.234",
                    "versionStartIncluding": "5.5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "171159A1-9827-4C7B-821D-55398B837C49",
                    "versionEndExcluding": "5.15.178",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "EDB5047C-0330-407A-BE1B-513B5BF304DE",
                    "versionEndExcluding": "6.1.128",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E8D39B53-7390-48BE-92FD-8846BE8E8430",
                    "versionEndExcluding": "6.6.75",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B04C243A-753B-49A9-87C7-92FCC1425FB7",
                    "versionEndExcluding": "6.12.12",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*",
                    "matchCriteriaId": "5A3F9505-6B98-4269-8B81-127E55A1BF00",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*",
                    "matchCriteriaId": "5DFCDFB8-4FD0-465A-9076-D813D78FE51B",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()\n\nThis patch addresses a null-ptr-deref in qt2_process_read_urb() due to\nan incorrect bounds check in the following:\n\n       if (newport \u003e serial-\u003enum_ports) {\n               dev_err(\u0026port-\u003edev,\n                       \"%s - port change to invalid port: %i\\n\",\n                       __func__, newport);\n               break;\n       }\n\nThe condition doesn\u0027t account for the valid range of the serial-\u003eport\nbuffer, which is from 0 to serial-\u003enum_ports - 1. When newport is equal\nto serial-\u003enum_ports, the assignment of \"port\" in the\nfollowing code is out-of-bounds and NULL:\n\n       serial_priv-\u003ecurrent_port = newport;\n       port = serial-\u003eport[serial_priv-\u003ecurrent_port];\n\nThe fix checks if newport is greater than or equal to serial-\u003enum_ports\nindicating it is out-of-bounds."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: serial: quatech2: arreglo de null-ptr-deref en qt2_process_read_urb() Este parche soluciona un null-ptr-deref en qt2_process_read_urb() debido a una comprobaci\u00f3n de los l\u00edmites incorrecta en lo siguiente: if (newport \u0026gt; serial-\u0026gt;num_ports) { dev_err(\u0026amp;port-\u0026gt;dev, \"%s - port change to invalid port: %i\\n\", __func__, newport); break; } La condici\u00f3n no tiene en cuenta el rango v\u00e1lido del b\u00fafer serial-\u0026gt;port, que es de 0 a serial-\u0026gt;num_ports - 1. Cuando newport es igual a serial-\u0026gt;num_ports, la asignaci\u00f3n de \"port\" en el siguiente c\u00f3digo est\u00e1 fuera de los l\u00edmites y es NULL: serial_priv-\u0026gt;current_port = newport; port = serial-\u0026gt;port[serial_priv-\u0026gt;current_port]; La soluci\u00f3n verifica si newport es mayor o igual que serial-\u0026gt;num_ports, lo que indica que est\u00e1 fuera de los l\u00edmites."
          }
        ],
        "id": "CVE-2025-21689",
        "lastModified": "2026-06-17T08:44:01.713",
        "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"
            },
            {
              "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-21689",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:51:31.131902Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-02-10T16:15:38.447",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T23:33:43+00:00",
      "cve": "CVE-2025-21689",
      "id": "CVE-2025-21689",
      "initial_release_date": "2025-02-10T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21689.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T20:59:10.756Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
              },
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-21689",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T19:51:31.131902Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T15:59:46.997Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/serial/quatech2.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "fa4c7472469d97c4707698b4c0e098f8cfc2bf22",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "94770cf7c5124f0268d481886829dc2beecc4507",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "4b9b41fabcd38990f69ef0cee9c631d954a2b530",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "6377838560c03b36e1153a42ef727533def9b68f",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "f371471708c7d997f763b0e70565026eb67cc470",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "8542b33622571f54dfc2a267fce378b6e3840b8b",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                },
                {
                  "lessThan": "575a5adf48b06a2980c9eeffedf699ed5534fade",
                  "status": "affected",
                  "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/serial/quatech2.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.5"
                },
                {
                  "lessThan": "3.5",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.290",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.234",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.178",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.128",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.75",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.12",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.13.*",
                  "status": "unaffected",
                  "version": "6.13.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.14",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.290",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.234",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.178",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.128",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.75",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.12",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.13.1",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.14",
                      "versionStartIncluding": "3.5",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()\n\nThis patch addresses a null-ptr-deref in qt2_process_read_urb() due to\nan incorrect bounds check in the following:\n\n       if (newport \u003e serial-\u003enum_ports) {\n               dev_err(\u0026port-\u003edev,\n                       \"%s - port change to invalid port: %i\\n\",\n                       __func__, newport);\n               break;\n       }\n\nThe condition doesn\u0027t account for the valid range of the serial-\u003eport\nbuffer, which is from 0 to serial-\u003enum_ports - 1. When newport is equal\nto serial-\u003enum_ports, the assignment of \"port\" in the\nfollowing code is out-of-bounds and NULL:\n\n       serial_priv-\u003ecurrent_port = newport;\n       port = serial-\u003eport[serial_priv-\u003ecurrent_port];\n\nThe fix checks if newport is greater than or equal to serial-\u003enum_ports\nindicating it is out-of-bounds."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T07:19:05.956Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22"
            },
            {
              "url": "https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507"
            },
            {
              "url": "https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe"
            },
            {
              "url": "https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530"
            },
            {
              "url": "https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f"
            },
            {
              "url": "https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470"
            },
            {
              "url": "https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b"
            },
            {
              "url": "https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade"
            }
          ],
          "title": "USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-21689",
        "datePublished": "2025-02-10T15:58:45.493Z",
        "dateReserved": "2024-12-29T08:45:45.741Z",
        "dateUpdated": "2025-11-03T20:59:10.756Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.