UBUNTU-CVE-2012-4565

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    UBUNTU-CVE-2012-4565

    Published: 31 Oct 2012Last Modified: 4 Feb 2026
    Upstream:
    CVE-2012-4565
    Aliases:
    USN-1644-1
    USN-1645-1
    USN-1646-1

    Summary:

    Details: The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.

    References: https://ubuntu.com/security/CVE-2012-4565, http://www.openwall.com/lists/oss-security/2012/10/31/4, http://thread.gmane.org/gmane.linux.network/247871, https://ubuntu.com/security/notices/USN-1644-1, https://ubuntu.com/security/notices/USN-1645-1, https://ubuntu.com/security/notices/USN-1646-1, https://ubuntu.com/security/notices/USN-1647-1, https://ubuntu.com/security/notices/USN-1648-1, https://ubuntu.com/security/notices/USN-1649-1, https://ubuntu.com/security/notices/USN-1650-1, https://ubuntu.com/security/notices/USN-1651-1, https://ubuntu.com/security/notices/USN-1652-1, https://ubuntu.com/security/notices/USN-1653-1, https://ubuntu.com/security/notices/USN-1704-1, https://www.cve.org/CVERecord?id=CVE-2012-4565

    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