UBUNTU-CVE-2021-46908

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    UBUNTU-CVE-2021-46908

    Published: 27 Feb 2024Last Modified: 6 Aug 2026
    Upstream:
    CVE-2021-46908

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: bpf: Use correct permission flag for mixed signed bounds arithmetic We forbid adding unknown scalars with mixed signed bounds due to the spectre v1 masking mitigation. Hence this also needs bypass_spec_v1 flag instead of allow_ptr_leaks.

    References: https://ubuntu.com/security/CVE-2021-46908, https://git.kernel.org/linus/9601148392520e2e134936e76788fc2a6371e7be, https://git.kernel.org/stable/c/4f3ff11204eac0ee23acf64deecb3bad7b0db0c6, https://git.kernel.org/stable/c/4ccdc6c6cae38b91c871293fb0ed8c6845a61b51, https://git.kernel.org/stable/c/9601148392520e2e134936e76788fc2a6371e7be, https://www.cve.org/CVERecord?id=CVE-2021-46908

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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
    UBUNTU-CVE-2021-46908 | CVE-DB