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    CVE-2021-33624

    In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

    Published:Jun 21, 2021
    Last Modified:Nov 11, 2025
    EPS:Jun 23, 2021
    EPSS Score:0.00714
    CVSS Score:4.7

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    http://www.openwall.com/lists/oss-security/2021/06/21/1http://www.openwall.com/lists/oss-security/2021/06/21/1https://github.com/benschlueter/CVE-2021-33624

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    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