CVE-2021-47668 (GCVE-0-2021-47668)
Vulnerability from cvelistv5
Published
2025-04-17 18:01
Modified
2025-05-04 07:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.
References
Impacted products
Vendor Product Version
Linux Linux Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
Version: 39549eef3587f1c1e8c65c88a2400d10fd30ea17
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      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.