CVE-2021-47620 (GCVE-0-2021-47620)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:08 – Updated: 2026-08-04 09:01
VLAI
Title
Bluetooth: refactor malicious adv data check
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: refactor malicious adv data check Check for out-of-bound read was being performed at the end of while num_reports loop, and would fill journal with false positives. Added check to beginning of loop processing so that it doesn't get checked after ptr has been advanced.
Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 048acfa4daf167b007b6bd8bef474e90c2282a5f , < 305e92f525450f3e1b5f5c9dc7eadb152d66a082 (git)
Affected: 7d4238edd3bf8b8c75571cc3b382bc10438ac588 , < 7889b38a7f21ed19314f83194622b195d328465c (git)
Affected: 185c77cbb53bc7481acc5a0b4e6119bbe393d561 , < 5a539c08d743d9910631448da78af5e961664c0e (git)
Affected: 4a1491432394b22e585a185ffca49086e4046aae , < 8819f93cd4a443dfe547aa622b21f723757df3fb (git)
Affected: 24161b9c43de966789d5956428f45002d10f878e , < 835d3706852537bf92eb23eb8635b8dee0c0aa67 (git)
Affected: ffc9019bd991707701273c2e5d8aed472229fc4d , < 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba (git)
Affected: 2de0e6a71ceb056e17e4684dce8b7640367996f9 , < bcea886771c3f22a590c8c8b9139a107bd7f1e1c (git)
Affected: 640a476e38fce6c70c738ac09e5167e34f570303 , < 5c968affa804ba98c3c603f37ffea6fba618025e (git)
Affected: 3a56ef719f0b9682afb8a86d64b2399e36faa4e6 , < 899663be5e75dc0174dc8bda0b5e6826edf0b29a (git)
Create a notification for this product.
Linux Linux Affected: 4.4.300 , < 4.4.302 (semver)
Affected: 4.9.298 , < 4.9.300 (semver)
Affected: 4.14.263 , < 4.14.265 (semver)
Affected: 4.19.226 , < 4.19.228 (semver)
Affected: 5.4.174 , < 5.4.176 (semver)
Affected: 5.10.94 , < 5.10.96 (semver)
Affected: 5.15.17 , < 5.15.19 (semver)
Affected: 5.16.3 , < 5.16.5 (semver)
Create a notification for this product.
Show details on NVD website
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:55:07+00:00",
      "cve": "CVE-2021-47620",
      "id": "CVE-2021-47620",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: refactor malicious adv data check",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47620.json",
      "version": "3"
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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.