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    CVE-2018-1092

    The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.

    Published:Mar 22, 2018
    Last Modified:Nov 21, 2024
    EPS:Apr 2, 2018
    EPSS Score:0.00342
    CVSS Score:5.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Extras Rt

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://openwall.com/lists/oss-security/2018/03/29/1
    https://access.redhat.com/errata/RHSA-2018:2948
    https://access.redhat.com/errata/RHSA-2018:3083
    https://access.redhat.com/errata/RHSA-2018:3096
    https://bugzilla.kernel.org/show_bug.cgi?id=199179
    https://bugzilla.kernel.org/show_bug.cgi?id=199275
    https://bugzilla.redhat.com/show_bug.cgi?id=1560777
    https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44
    https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
    https://usn.ubuntu.com/3676-1/
    https://usn.ubuntu.com/3676-2/
    https://usn.ubuntu.com/3677-1/
    https://usn.ubuntu.com/3677-2/
    https://usn.ubuntu.com/3678-1/
    https://usn.ubuntu.com/3678-2/
    https://usn.ubuntu.com/3678-3/
    https://usn.ubuntu.com/3678-4/
    https://usn.ubuntu.com/3754-1/
    https://www.debian.org/security/2018/dsa-4187
    https://www.debian.org/security/2018/dsa-4188
    http://openwall.com/lists/oss-security/2018/03/29/1
    https://access.redhat.com/errata/RHSA-2018:2948
    https://access.redhat.com/errata/RHSA-2018:3083
    https://access.redhat.com/errata/RHSA-2018:3096
    https://bugzilla.kernel.org/show_bug.cgi?id=199179
    https://bugzilla.kernel.org/show_bug.cgi?id=199275
    https://bugzilla.redhat.com/show_bug.cgi?id=1560777
    https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44
    https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
    https://usn.ubuntu.com/3676-1/
    https://usn.ubuntu.com/3676-2/
    https://usn.ubuntu.com/3677-1/
    https://usn.ubuntu.com/3677-2/
    https://usn.ubuntu.com/3678-1/
    https://usn.ubuntu.com/3678-2/
    https://usn.ubuntu.com/3678-3/
    https://usn.ubuntu.com/3678-4/
    https://usn.ubuntu.com/3754-1/
    https://www.debian.org/security/2018/dsa-4187
    https://www.debian.org/security/2018/dsa-4188

    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