CVE-2021-47120 (GCVE-0-2021-47120)

Vulnerability from cvelistv5 – Published: 2024-03-15 20:14 – Updated: 2026-05-11 13:48
VLAI
Title
HID: magicmouse: fix NULL-deref on disconnect
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: fix NULL-deref on disconnect Commit 9d7b18668956 ("HID: magicmouse: add support for Apple Magic Trackpad 2") added a sanity check for an Apple trackpad but returned success instead of -ENODEV when the check failed. This means that the remove callback will dereference the never-initialised driver data pointer when the driver is later unbound (e.g. on USB disconnect).
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9d7b18668956c411a422d04c712994c5fdb23a4b , < 368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6 (git)
Affected: 9d7b18668956c411a422d04c712994c5fdb23a4b , < b5d013c4c76b276890135b5d32803c4c63924b77 (git)
Affected: 9d7b18668956c411a422d04c712994c5fdb23a4b , < 9cf27473f21913a3eaf4702dd2a25415afd5f33f (git)
Affected: 9d7b18668956c411a422d04c712994c5fdb23a4b , < 4b4f6cecca446abcb686c6e6c451d4f1ec1a7497 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.125 , ≤ 5.4.* (semver)
Unaffected: 5.10.43 , ≤ 5.10.* (semver)
Unaffected: 5.12.10 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T14:06:06+00:00",
      "cve": "CVE-2021-47120",
      "id": "CVE-2021-47120",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "108",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: HID: magicmouse: fix NULL-deref on disconnect",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47120.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-05-12T05:05:01Z",
      "cve": "CVE-2021-47120",
      "id": "CVE-2021-47120",
      "initial_release_date": "2024-03-19T03:50:24Z",
      "product_status:known_affected": "358",
      "product_status:known_not_affected": "191",
      "product_status:recommended": "137",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47120",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47120.json",
      "version": "37"
    },
    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2021-47120\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:35:36.203Z\", \"dateReserved\": \"2024-03-04T18:12:48.838Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-15T20:14:26.578Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Taxonomy of the tags.





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.