CVE-2021-39656

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    CVE-2021-39656

    Published: 15 Dec 2021Last Modified: 10 Apr 2026

    Summary:

    Details: In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-174049066References: Upstream kernel

    References: https://source.android.com/security/bulletin/pixel/2021-12-01, https://source.android.com/security/bulletin/pixel/2021-12-01

    Affected packages

    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
    CVE-2021-39656 | CVE-DB