CVE-2026-64273 (GCVE-0-2026-64273)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-08-17 04:52
VLAI
Title
Input: iforce - bound the device-reported force-feedback effect index
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: iforce - bound the device-reported force-feedback effect index iforce_process_packet() handles a status report (packet id 0x02) by taking a force-feedback effect index straight from the device wire and using it to address the per-effect state array: i = data[1] & 0x7f; if (data[1] & 0x80) { if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) ... } else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) { ... } The index is masked only with 0x7f, so it ranges 0..127, but core_effects[] holds only IFORCE_EFFECTS_MAX (32) entries. For an index of 32..127 the test_and_set_bit()/test_and_clear_bit() is an out-of-bounds single-bit read-modify-write past the array. core_effects[] is the second-to-last member of struct iforce, so the write lands in the trailing members and beyond the embedding kzalloc()'d iforce_serio / iforce_usb object. data[1] is unvalidated device payload on both transports (the USB interrupt endpoint and serio), and the status path is not gated on force feedback being present, so a malicious or counterfeit device can set or clear a bit at an attacker-chosen offset past the object. Reject an out-of-range index instead of indexing with it. Bound against the array dimension IFORCE_EFFECTS_MAX rather than dev->ff->max_effects so the check guarantees memory safety regardless of how many effects the device registered. A legitimate "effect started/stopped" status always carries an index below IFORCE_EFFECTS_MAX, so well-formed devices are unaffected; the neighbouring mark_core_as_ready() loop is already bounded and is left untouched.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7064 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b1b79e89bc33e4c682d3df7ae2aadc62b5a0c310 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d10b0507fa0f5b46764b178e3271f9012f2df677 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6c0f2901c9d325d4a0574c4237fd507810d225ff (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c21295616a8a52b9a5f18cd4ca8c73030eda3d4f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e5fa31f0550b55d80045669ae9080dd5b88abffa (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 70019779325f2bb5f5a4098e91e79c655f50fcef (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a40250f97c312e000e3616c9074022311a0efbc3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0e9943d2e4c63496b6ca84bc66fd3c71d40558e2 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (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)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: iforce - bound the device-reported force-feedback effect index\n\niforce_process_packet() handles a status report (packet id 0x02) by\ntaking a force-feedback effect index straight from the device wire and\nusing it to address the per-effect state array:\n\n\ti = data[1] \u0026 0x7f;\n\tif (data[1] \u0026 0x80) {\n\t\tif (!test_and_set_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce-\u003ecore_effects[i].flags))\n\t\t\t...\n\t} else if (test_and_clear_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce-\u003ecore_effects[i].flags)) {\n\t\t...\n\t}\n\nThe index is masked only with 0x7f, so it ranges 0..127, but\ncore_effects[] holds only IFORCE_EFFECTS_MAX (32) entries.  For an index\nof 32..127 the test_and_set_bit()/test_and_clear_bit() is an\nout-of-bounds single-bit read-modify-write past the array.  core_effects[]\nis the second-to-last member of struct iforce, so the write lands in the\ntrailing members and beyond the embedding kzalloc()\u0027d iforce_serio /\niforce_usb object.\n\ndata[1] is unvalidated device payload on both transports (the USB\ninterrupt endpoint and serio), and the status path is not gated on force\nfeedback being present, so a malicious or counterfeit device can set or\nclear a bit at an attacker-chosen offset past the object.\n\nReject an out-of-range index instead of indexing with it.  Bound against\nthe array dimension IFORCE_EFFECTS_MAX rather than dev-\u003eff-\u003emax_effects so\nthe check guarantees memory safety regardless of how many effects the\ndevice registered.  A legitimate \"effect started/stopped\" status always\ncarries an index below IFORCE_EFFECTS_MAX, so well-formed devices are\nunaffected; the neighbouring mark_core_as_ready() loop is already bounded\nand is left untouched."
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "476CB3A5-D022-4F13-AAEF-CB6A5785516A",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: iforce - bound the device-reported force-feedback effect index\n\niforce_process_packet() handles a status report (packet id 0x02) by\ntaking a force-feedback effect index straight from the device wire and\nusing it to address the per-effect state array:\n\n\ti = data[1] \u0026 0x7f;\n\tif (data[1] \u0026 0x80) {\n\t\tif (!test_and_set_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce-\u003ecore_effects[i].flags))\n\t\t\t...\n\t} else if (test_and_clear_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce-\u003ecore_effects[i].flags)) {\n\t\t...\n\t}\n\nThe index is masked only with 0x7f, so it ranges 0..127, but\ncore_effects[] holds only IFORCE_EFFECTS_MAX (32) entries.  For an index\nof 32..127 the test_and_set_bit()/test_and_clear_bit() is an\nout-of-bounds single-bit read-modify-write past the array.  core_effects[]\nis the second-to-last member of struct iforce, so the write lands in the\ntrailing members and beyond the embedding kzalloc()\u0027d iforce_serio /\niforce_usb object.\n\ndata[1] is unvalidated device payload on both transports (the USB\ninterrupt endpoint and serio), and the status path is not gated on force\nfeedback being present, so a malicious or counterfeit device can set or\nclear a bit at an attacker-chosen offset past the object.\n\nReject an out-of-range index instead of indexing with it.  Bound against\nthe array dimension IFORCE_EFFECTS_MAX rather than dev-\u003eff-\u003emax_effects so\nthe check guarantees memory safety regardless of how many effects the\ndevice registered.  A legitimate \"effect started/stopped\" status always\ncarries an index below IFORCE_EFFECTS_MAX, so well-formed devices are\nunaffected; the neighbouring mark_core_as_ready() loop is already bounded\nand is left untouched."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: iforce - se limit\u00f3 el \u00edndice de efecto de retroalimentaci\u00f3n de fuerza reportado por el dispositivo\n\niforce_process_packet() maneja un informe de estado (ID de paquete 0x02) tomando un \u00edndice de efecto de retroalimentaci\u00f3n de fuerza directamente del cable del dispositivo y us\u00e1ndolo para direccionar el array de estado por efecto:\n\n\ti = data[1] \u0026 0x7f;\n\tif (data[1] \u0026 0x80) {\n\t\tif (!test_and_set_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce  -\u003e  core_effects[i].flags))\n\t\t\t...\n\t} else if (test_and_clear_bit(FF_CORE_IS_PLAYED,\n\t\t\t\t      iforce  -\u003e  core_effects[i].flags)) {\n\t\t...\n\t}\n\nEl \u00edndice se enmascara solo con 0x7f, por lo que su rango es 0..127, pero core_effects[] contiene solo IFORCE_EFFECTS_MAX (32) entradas. Para un \u00edndice de 32..127, el test_and_set_bit()/test_and_clear_bit() es una operaci\u00f3n de lectura-modificaci\u00f3n-escritura de un solo bit fuera de los l\u00edmites del array. core_effects[] es el pen\u00faltimo miembro de la estructura iforce, por lo que la escritura cae en los miembros finales y m\u00e1s all\u00e1 del objeto iforce_serio / iforce_usb incrustado asignado con kzalloc().\n\ndata[1] es una carga \u00fatil de dispositivo no validada en ambos transportes (el punto final de interrupci\u00f3n USB y serio), y la ruta de estado no est\u00e1 condicionada a la presencia de retroalimentaci\u00f3n de fuerza, por lo que un dispositivo malicioso o falsificado puede establecer o borrar un bit en un desplazamiento elegido por el atacante m\u00e1s all\u00e1 del objeto.\n\nRechazar un \u00edndice fuera de rango en lugar de indexar con \u00e9l. Limitar contra la dimensi\u00f3n del array IFORCE_EFFECTS_MAX en lugar de dev  -\u003e  ff  -\u003e  max_effects para que la comprobaci\u00f3n garantice la seguridad de la memoria independientemente de cu\u00e1ntos efectos haya registrado el dispositivo. Un estado leg\u00edtimo de \u2019efecto iniciado/detenido\u2019 siempre lleva un \u00edndice por debajo de IFORCE_EFFECTS_MAX, por lo que los dispositivos bien formados no se ven afectados; el bucle adyacente mark_core_as_ready() ya est\u00e1 limitado y se deja intacto."
          }
        ],
        "id": "CVE-2026-64273",
        "lastModified": "2026-10-24T13:10:00.147",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-07-25T10:17:07.660",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0e9943d2e4c63496b6ca84bc66fd3c71d40558e2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6c0f2901c9d325d4a0574c4237fd507810d225ff"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/70019779325f2bb5f5a4098e91e79c655f50fcef"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a40250f97c312e000e3616c9074022311a0efbc3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b1b79e89bc33e4c682d3df7ae2aadc62b5a0c310"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c21295616a8a52b9a5f18cd4ca8c73030eda3d4f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d10b0507fa0f5b46764b178e3271f9012f2df677"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e5fa31f0550b55d80045669ae9080dd5b88abffa"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-129"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-19T23:36:44+00:00",
      "cve": "CVE-2026-64273",
      "id": "CVE-2026-64273",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: iforce - bound the device-reported force-feedback effect index",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64273.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-17T00:12:32Z",
      "cve": "CVE-2026-64273",
      "id": "CVE-2026-64273",
      "initial_release_date": "2026-07-25T16:46:50Z",
      "product_status:known_affected": "400",
      "product_status:known_not_affected": "335",
      "product_status:recommended": "256",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64273",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-64273.json",
      "version": "13"
    }
  }
}



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