FKIE_CVE-2025-21746

Vulnerability from fkie_nvd - Published: 2025-02-27 03:15 - Updated: 2026-06-17 08:44
Severity
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: synaptics - fix crash when enabling pass-through port When enabling a pass-through port an interrupt might come before psmouse driver binds to the pass-through port. However synaptics sub-driver tries to access psmouse instance presumably associated with the pass-through port to figure out if only 1 byte of response or entire protocol packet needs to be forwarded to the pass-through port and may crash if psmouse instance has not been attached to the port yet. Fix the crash by introducing open() and close() methods for the port and check if the port is open before trying to access psmouse instance. Because psmouse calls serio_open() only after attaching psmouse instance to serio port instance this prevents the potential crash.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/synaptics.c",
            "drivers/input/mouse/synaptics.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c",
              "status": "affected",
              "version": "100e16959c3ca8cb7be788ed3e2c5867481f35f6",
              "versionType": "git"
            },
            {
              "lessThan": "3e179d3f1ada963475395d81bfe91daef4d1a24c",
              "status": "affected",
              "version": "100e16959c3ca8cb7be788ed3e2c5867481f35f6",
              "versionType": "git"
            },
            {
              "lessThan": "87da1ea93ec9f9f0004e5b12e78789bc94e360bf",
              "status": "affected",
              "version": "100e16959c3ca8cb7be788ed3e2c5867481f35f6",
              "versionType": "git"
            },
            {
              "lessThan": "08bd5b7c9a2401faabdaa1472d45c7de0755fd7e",
              "status": "affected",
              "version": "100e16959c3ca8cb7be788ed3e2c5867481f35f6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/synaptics.c",
            "drivers/input/mouse/synaptics.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.3",
              "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": "7DB56FB4-9839-41B6-BEBD-7F0DB90E2DA8",
              "versionEndExcluding": "6.6.80",
              "versionStartIncluding": "6.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "15370AEE-6D1C-49C3-8CB7-E889D5F92B6F",
              "versionEndExcluding": "6.12.17",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0E92CEE3-1FC3-4AFC-A513-DEDBA7414F00",
              "versionEndExcluding": "6.13.3",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics - fix crash when enabling pass-through port\n\nWhen enabling a pass-through port an interrupt might come before psmouse\ndriver binds to the pass-through port. However synaptics sub-driver\ntries to access psmouse instance presumably associated with the\npass-through port to figure out if only 1 byte of response or entire\nprotocol packet needs to be forwarded to the pass-through port and may\ncrash if psmouse instance has not been attached to the port yet.\n\nFix the crash by introducing open() and close() methods for the port and\ncheck if the port is open before trying to access psmouse instance.\nBecause psmouse calls serio_open() only after attaching psmouse instance\nto serio port instance this prevents the potential crash."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Entrada: synaptics - arregla el fallo al habilitar el puerto de paso Al habilitar un puerto de paso, puede aparecer una interrupci\u00f3n antes de que el controlador psmouse se vincule al puerto de paso. Sin embargo, el subcontrolador synaptics intenta acceder a la instancia psmouse presuntamente asociada con el puerto de paso para averiguar si solo se necesita reenviar 1 byte de respuesta o el paquete de protocolo completo al puerto de paso y puede bloquearse si la instancia psmouse a\u00fan no se ha adjuntado al puerto. Arregla el bloqueo introduciendo los m\u00e9todos open() y close() para el puerto y comprueba si el puerto est\u00e1 abierto antes de intentar acceder a la instancia psmouse. Debido a que psmouse llama a serio_open() solo despu\u00e9s de adjuntar la instancia psmouse a la instancia del puerto serio, esto evita el posible bloqueo."
    }
  ],
  "id": "CVE-2025-21746",
  "lastModified": "2026-06-17T08:44:10.730",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-27T03:15:15.243",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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