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CVE-2021-47668 – Linux Kernel CAN: Use After Free

The following table lists the changes that have been made to the
CVE-2021-47668 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • CVE Modified
    by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Apr. 17, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-416
  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Apr. 17, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94
    Added Reference https://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234
    Added Reference https://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
    Added Reference https://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a
    Added Reference https://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421
    Added Reference https://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328
    Added Reference https://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
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