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CVE-2026-80763 (GCVE-0-2026-80763)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12
VLAI
Title
Bluetooth: hci_event: validate LE Set CIG Parameters response
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate LE Set CIG Parameters response The Command Complete dispatch validates only the fixed part of the LE Set CIG Parameters response. After that part is pulled from the skb, hci_cc_le_set_cig_params() trusts num_handles and reads each entry in the trailing handle array. Matching num_handles against the command's num_cis does not guarantee that the response contains the advertised handles. A truncated response from a malfunctioning controller can therefore make the handler read beyond the skb data. Validate that the remaining skb data contains all advertised handles. Include this in the existing response validation so malformed responses also follow the established CIG failure handling.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < 9e05783d0bb96a7b853cc058a7c7de2dc4a62154 (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < 26741d178f31932c9018b36b7953e6dc391436a4 (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < a34df5c4a439cfc04565fa5be608ed1e53134f1f (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < e3f82e8f2a5915f533b57a065e9a045aa2ee03bc (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < d83ecb7b96105d932dabaa56ccd7418c25fb7cbb (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < 6fc540e835dddb518cef3ff522b780f701cd03df (git)
Affected: 26afbd826ee326e63a334c37fd45e82e50a615ec , < 0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.187 , ≤ 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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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: validate LE Set CIG Parameters response\n\nThe Command Complete dispatch validates only the fixed part of the LE Set\nCIG Parameters response. After that part is pulled from the skb,\nhci_cc_le_set_cig_params() trusts num_handles and reads each entry in the\ntrailing handle array.\n\nMatching num_handles against the command\u0027s num_cis does not guarantee\nthat the response contains the advertised handles. A truncated response\nfrom a malfunctioning controller can therefore make the handler read\nbeyond the skb data.\n\nValidate that the remaining skb data contains all advertised handles.\nInclude this in the existing response validation so malformed responses\nalso follow the established CIG failure handling."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:35.652Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "datePublished": "2026-09-04T15:12:35.652Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-09-04T15:12:35.652Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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      "cve": "CVE-2026-80763",
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      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Bluetooth: hci_event: validate LE Set CIG Parameters response",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80763.json",
      "version": "1"
    },
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    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-07T16:20:08Z",
      "cve": "CVE-2026-80763",
      "id": "CVE-2026-80763",
      "initial_release_date": "2026-09-05T00:27:59Z",
      "product_status:known_affected": "30",
      "product_status:known_not_affected": "323",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80763",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80763.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

Author Source Type Date Other

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.