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
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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                    "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."
          }
        ],
        "id": "CVE-2026-64273",
        "lastModified": "2026-08-17T05:17:26.330",
        "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": "None",
      "current_release_date": "2026-08-08T04:38:49+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": "274",
      "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": "2026-10-03T00:47:34Z",
      "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/cve-2026-64273.json",
      "version": "12"
    }
  }
}



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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.

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  • 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.
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  • 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.



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.