UBUNTU-CVE-2021-36084

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    UBUNTU-CVE-2021-36084

    Published: 1 Jul 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-36084
    Aliases:
    USN-5391-1

    Summary:

    Details: The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

    References: https://ubuntu.com/security/CVE-2021-36084, https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaml, https://ubuntu.com/security/notices/USN-5391-1, https://www.cve.org/CVERecord?id=CVE-2021-36084

    Affected packages

    Package

    Name: libsepol

    Purl: pkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.4-2ubuntu0.1~esm1

    Affected versions

    2.3-2

    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-2021-36084 | CVE-DB