UBUNTU-CVE-2018-12233

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    UBUNTU-CVE-2018-12233

    Published: 12 Jun 2018Last Modified: 26 Aug 2026
    Upstream:
    CVE-2018-12233
    Aliases:
    USN-3752-1
    USN-3752-2
    USN-3752-3

    Summary:

    Details: In the ea_get function in fs/jfs/xattr.c in the Linux kernel through 4.17.1, a memory corruption bug in JFS can be triggered by calling setxattr twice with two different extended attribute names on the same file. This vulnerability can be triggered by an unprivileged user with the ability to create files and execute programs. A kmalloc call is incorrect, leading to slab-out-of-bounds in jfs_xattr.

    References: https://ubuntu.com/security/CVE-2018-12233, https://lkml.org/lkml/2018/6/2/2, https://marc.info/?l=linux-kernel&m=152814391530549&w=2, https://ubuntu.com/security/notices/USN-3752-1, https://ubuntu.com/security/notices/USN-3752-2, https://ubuntu.com/security/notices/USN-3753-1, https://ubuntu.com/security/notices/USN-3753-2, https://ubuntu.com/security/notices/USN-3754-1, https://ubuntu.com/security/notices/USN-3752-3, https://www.cve.org/CVERecord?id=CVE-2018-12233

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-157.207

    Affected versions

    3.11.0-12.19

    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