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    CVE-2021-47520

    In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.

    Published:May 24, 2024
    Last Modified:Aug 4, 2026
    EPS:May 24, 2024
    EPSS Score:0.00242
    CVSS Score:8.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
    https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
    https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
    https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
    https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db
    https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
    https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
    https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d
    https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
    https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
    https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
    https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
    https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db
    https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
    https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
    https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High