UBUNTU-CVE-2018-16884

    Dashboard / Vulnerabilities / UBUNTU-CVE-2018-16884

    UBUNTU-CVE-2018-16884

    Published: 18 Dec 2018Last Modified: 18 Aug 2026
    Upstream:
    CVE-2018-16884
    Aliases:
    USN-3932-1
    USN-3932-2
    USN-3980-1

    Summary:

    Details: A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

    References: https://ubuntu.com/security/CVE-2018-16884, https://lore.kernel.org/linux-nfs/[email protected]/T/#m6b9e4d7efcc6b3564f9d53c051caf2370ae8e70a, https://ubuntu.com/security/notices/USN-3932-1, https://ubuntu.com/security/notices/USN-3932-2, https://ubuntu.com/security/notices/USN-3980-1, https://ubuntu.com/security/notices/USN-3981-1, https://ubuntu.com/security/notices/USN-3980-2, https://ubuntu.com/security/notices/USN-3981-2, https://www.cve.org/CVERecord?id=CVE-2018-16884

    Affected packages

    Package

    Name: linux-aws

    Purl: pkg:deb/ubuntu/linux-aws?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.4.0-1040.43

    Affected versions

    4.4.0-1002.2
    4.4.0-1003.3
    4.4.0-1005.5
    4.4.0-1006.6
    4.4.0-1009.9
    4.4.0-1010.10
    4.4.0-1011.11
    4.4.0-1012.12
    4.4.0-1014.14
    4.4.0-1016.16
    4.4.0-1017.17
    4.4.0-1019.19
    4.4.0-1022.22
    4.4.0-1023.23
    4.4.0-1024.25
    4.4.0-1025.26
    4.4.0-1027.30
    4.4.0-1028.31
    4.4.0-1029.32
    4.4.0-1031.34
    4.4.0-1032.35
    4.4.0-1034.37
    4.4.0-1036.39
    4.4.0-1037.40
    4.4.0-1038.41
    4.4.0-1039.42

    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