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CVE-2026-80772 (GCVE-0-2026-80772)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12
VLAI
Title
HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler() joycon_ctlr_read_handler() casts an incoming HID input report to struct joycon_input_report and parses it, guarding the cast only with a 12-byte length check: if (size >= 12) /* make sure it contains the input report */ joycon_parse_report(ctlr, (struct joycon_input_report *)data); struct joycon_input_report is 49 bytes: a 13-byte header followed by a union whose IMU arm is 36 bytes. For an IMU report joycon_parse_report() -> joycon_parse_imu_report() walks that union (struct offsets 13..48), so a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes the guard yet is read up to 37 bytes past its declared length. The over-read bytes are decoded into accelerometer/gyroscope values and forwarded to userspace through the "(IMU)" input device, leaking driver-internal memory. data[0] and size are fully controlled by a malicious or spoofed Joy-Con/Pro Controller. Receive buffers are sized to the maximum report length, so this is an over-read within the allocation rather than a slab OOB, but the decoded bytes still reach userspace. The sibling subcmd path in joycon_ctlr_handle_event() already bounds the same cast correctly: if (size < sizeof(struct joycon_input_report) || data[0] != JC_INPUT_SUBCMD_REPLY) break; Use the same sizeof(struct joycon_input_report) bound here.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < 33ea29f8b6141f2d265de807e110a6435b355cb0 (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < bd397c4123a4bc084913d8c7fdb40ef94e9f8172 (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < addca61f9a23c0d20a387c2040e70479f54518e1 (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < 51cfd1adbe7a46bb08af162abb3ab3b6820e2d15 (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < d4cabd4089adb59cf7974915737c52cc47a9bb1b (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < 34725ed4719da424113db8449fb5485aaf71a913 (git)
Affected: 2af16c1f846bd60240745bbd3afa13d5f040c61a , < 27b376b945c0aac46fcdfcc950b14a85b874b557 (git)
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Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()\n\njoycon_ctlr_read_handler() casts an incoming HID input report to\nstruct joycon_input_report and parses it, guarding the cast only with a\n12-byte length check:\n\n\tif (size \u003e= 12) /* make sure it contains the input report */\n\t\tjoycon_parse_report(ctlr, (struct joycon_input_report *)data);\n\nstruct joycon_input_report is 49 bytes: a 13-byte header followed by a\nunion whose IMU arm is 36 bytes. For an IMU report joycon_parse_report()\n-\u003e joycon_parse_imu_report() walks that union (struct offsets 13..48),\nso a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes\nthe guard yet is read up to 37 bytes past its declared length. The\nover-read bytes are decoded into accelerometer/gyroscope values and\nforwarded to userspace through the \"(IMU)\" input device, leaking\ndriver-internal memory. data[0] and size are fully controlled by a\nmalicious or spoofed Joy-Con/Pro Controller.\n\nReceive buffers are sized to the maximum report length, so this is an\nover-read within the allocation rather than a slab OOB, but the decoded\nbytes still reach userspace.\n\nThe sibling subcmd path in joycon_ctlr_handle_event() already bounds the\nsame cast correctly:\n\n\tif (size \u003c sizeof(struct joycon_input_report) ||\n\t    data[0] != JC_INPUT_SUBCMD_REPLY)\n\t\tbreak;\n\nUse the same sizeof(struct joycon_input_report) bound here."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:44.445Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80772",
    "datePublished": "2026-09-04T15:12:44.445Z",
    "dateReserved": "2026-08-26T14:34:25.792Z",
    "dateUpdated": "2026-09-04T15:12:44.445Z",
    "state": "PUBLISHED"
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      "date": "2026-09-14",
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      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80772.json",
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For an IMU report joycon_parse_report()\\n-\u003e joycon_parse_imu_report() walks that union (struct offsets 13..48),\\nso a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes\\nthe guard yet is read up to 37 bytes past its declared length. 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    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-07T16:19:55Z",
      "cve": "CVE-2026-80772",
      "id": "CVE-2026-80772",
      "initial_release_date": "2026-09-05T00:27:50Z",
      "product_status:known_affected": "30",
      "product_status:known_not_affected": "323",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80772",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80772.json",
      "version": "4"
    }
  }
}



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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.

Sightings

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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.