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    CVE-2015-8709

    kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

    Published:Dec 12, 2015
    Last Modified:Apr 12, 2025
    EPS:Feb 8, 2016
    EPSS Score:0.00059
    CVSS Score:7

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00025.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00027.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00028.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00029.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00030.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00031.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00032.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00033.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00034.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00036.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00037.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
    http://marc.info/?l=linux-kernel&m=145204362722256&w=2
    http://marc.info/?l=linux-kernel&m=145204641422813&w=2
    http://www.debian.org/security/2016/dsa-3434
    http://www.openwall.com/lists/oss-security/2015/12/17/12
    http://www.openwall.com/lists/oss-security/2015/12/31/5
    http://www.securityfocus.com/bid/79899
    http://www.securitytracker.com/id/1034899
    https://bugzilla.redhat.com/show_bug.cgi?id=1295287
    https://lkml.org/lkml/2015/12/25/71
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00025.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00027.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00028.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00029.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00030.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00031.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00032.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00033.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00034.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00036.html
    http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00037.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
    http://marc.info/?l=linux-kernel&m=145204362722256&w=2
    http://marc.info/?l=linux-kernel&m=145204641422813&w=2
    http://www.debian.org/security/2016/dsa-3434
    http://www.openwall.com/lists/oss-security/2015/12/17/12
    http://www.openwall.com/lists/oss-security/2015/12/31/5
    http://www.securityfocus.com/bid/79899
    http://www.securitytracker.com/id/1034899
    https://bugzilla.redhat.com/show_bug.cgi?id=1295287
    https://lkml.org/lkml/2015/12/25/71

    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