UBUNTU-CVE-2012-6547

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    UBUNTU-CVE-2012-6547

    Published: 15 Mar 2013Last Modified: 4 Feb 2026
    Upstream:
    CVE-2012-6547
    Aliases:
    USN-1554-1
    USN-1558-1
    USN-1563-1

    Summary:

    Details: The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

    References: https://ubuntu.com/security/CVE-2012-6547, http://www.openwall.com/lists/oss-security/2013/03/07, http://www.openwall.com/lists/oss-security/2013/03/07/2, https://ubuntu.com/security/notices/USN-1554-1, https://ubuntu.com/security/notices/USN-1558-1, https://ubuntu.com/security/notices/USN-1563-1, https://ubuntu.com/security/notices/USN-1579-1, https://ubuntu.com/security/notices/USN-1580-1, https://ubuntu.com/security/notices/USN-1651-1, https://ubuntu.com/security/notices/USN-1653-1, https://www.cve.org/CVERecord?id=CVE-2012-6547

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.11.0-12.19

    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