CVE-2016-9604

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    CVE-2016-9604

    Published: 11 Jul 2018Last Modified: 16 Apr 2026

    Summary:

    Details: It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring.

    References: http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.html, http://www.securityfocus.com/bid/102135, https://access.redhat.com/errata/RHSA-2017:1842, https://access.redhat.com/errata/RHSA-2017:2077, https://access.redhat.com/errata/RHSA-2017:2669, https://bugzilla.novell.com/show_bug.cgi?id=1035576, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9604, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee8f844e3c5a73b999edf733df1c529d6503ec2f

    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