CVE-2026-63943 (GCVE-0-2026-63943)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
Input: xpad - fix out-of-bounds access for Share button
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: xpad - fix out-of-bounds access for Share button xpadone_process_packet() receives len directly from urb->actual_length and uses it to index the share-button byte at data[len - 18] or data[len - 26]. Since both len and data[0] are under the device's control, a broken controller can send a GIP_CMD_INPUT packet with actual_length < 18 (e.g. 5 bytes) and reach this code path, causing accesses beyond the actual array. Fix this by calculating the offset and checking bounds against the packet length.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cbc82e7db16d59c301457312a624a7de2c03cd4a , < bcfb4833cd4078a1a356ef451838b75cd233099e (git)
Affected: 302a0cd0bbc450998429a3f4267970a4b93251a8 , < 37ec54abfdd63a63fd50734a9c4e4cbc1e5795af (git)
Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 9749db57233b396353ad5dee81eec9d9880c9246 (git)
Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 6346b0895b574ce45f3747b9c508c72f70e6abef (git)
Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 6cdc46b38cf146ce81d4831b6472dbf7731849a2 (git)
Affected: a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8 (git)
Affected: 6.6.91 , < 6.6.143 (semver)
Affected: 6.12.29 , < 6.12.93 (semver)
Affected: 6.14.7 , < 6.15 (semver)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/input/joystick/xpad.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: xpad - fix out-of-bounds access for Share button\n\nxpadone_process_packet() receives len directly from urb-\u003eactual_length\nand uses it to index the share-button byte at data[len - 18] or\ndata[len - 26]. Since both len and data[0] are under the device\u0027s\ncontrol, a broken controller can send a GIP_CMD_INPUT packet with\nactual_length \u003c 18 (e.g. 5 bytes) and reach this code path, causing\naccesses beyond the actual array.\n\nFix this by calculating the offset and checking bounds against the\npacket length."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:38.411Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "Input: xpad - fix out-of-bounds access for Share button",
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    "dateReserved": "2026-07-19T07:54:57.022Z",
    "dateUpdated": "2026-07-19T14:55:38.411Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T22:10:48+00:00",
      "cve": "CVE-2026-63943",
      "id": "CVE-2026-63943",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: xpad - fix out-of-bounds access for Share button",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63943.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-21T13:03:02Z",
      "cve": "CVE-2026-63943",
      "id": "CVE-2026-63943",
      "initial_release_date": "2026-07-21T13:03:02Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63943",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63943.json",
      "version": "2"
    }
  }
}



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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.