UBUNTU-CVE-2021-4135

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    UBUNTU-CVE-2021-4135

    Published: 24 Dec 2021Last Modified: 14 Sept 2026
    Upstream:
    CVE-2021-4135
    Aliases:
    USN-5278-1
    USN-5337-1
    USN-5338-1

    Summary:

    Details: A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.

    References: https://ubuntu.com/security/CVE-2021-4135, https://git.kernel.org/linus/481221775d53d6215a6e5e9ce1cce6d2b4ab9a46, https://ubuntu.com/security/notices/USN-5278-1, https://ubuntu.com/security/notices/USN-5337-1, https://ubuntu.com/security/notices/USN-5338-1, https://ubuntu.com/security/notices/USN-5368-1, https://ubuntu.com/security/notices/USN-5377-1, https://www.cve.org/CVERecord?id=CVE-2021-4135

    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-2021-4135 | CVE-DB