UBUNTU-CVE-2021-28375

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    UBUNTU-CVE-2021-28375

    Published: 15 Mar 2021Last Modified: 9 Sept 2026
    Upstream:
    CVE-2021-28375
    Aliases:
    USN-4911-1
    USN-4945-1
    USN-4945-2

    Summary:

    Details: An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka CID-20c40794eb85. This is a related issue to CVE-2019-2308.

    References: https://ubuntu.com/security/CVE-2021-28375, https://git.kernel.org/linus/20c40794eb85ea29852d7bc37c55713802a543d6, https://lore.kernel.org/stable/[email protected], https://ubuntu.com/security/notices/USN-4911-1, https://ubuntu.com/security/notices/USN-4945-1, https://ubuntu.com/security/notices/USN-4947-1, https://ubuntu.com/security/notices/USN-4949-1, https://ubuntu.com/security/notices/USN-4945-2, https://www.cve.org/CVERecord?id=CVE-2021-28375

    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-2021-28375 | CVE-DB