CVE-2019-3901

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    CVE-2019-3901

    Published: 22 Apr 2019Last Modified: 15 Mar 2026

    Summary:

    Details: A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.

    References: https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html, https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html, https://security.netapp.com/advisory/ntap-20190517-0005/, http://www.securityfocus.com/bid/89937, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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