Upstream information

CVE-2015-5283 at MITRE

Description

The sctp_init function in net/sctp/protocol.c in the Linux kernel before 4.2.3 has an incorrect sequence of protocol-initialization steps, which allows local users to cause a denial of service (panic or memory corruption) by creating SCTP sockets before all of the steps have finished.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.7
Vector AV:L/AC:M/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
SUSE Bugzilla entry: 947155 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Build System Kit 12
  • kernel-zfcpdump >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-BSK-12-2015-668
SUSE-SLE-BSK-12-2015-945
SUSE Linux Enterprise Desktop 12 SP1
  • kernel-default >= 3.12.49-11.1
  • kernel-default-devel >= 3.12.49-11.1
  • kernel-default-extra >= 3.12.49-11.1
  • kernel-devel >= 3.12.49-11.1
  • kernel-macros >= 3.12.49-11.1
  • kernel-source >= 3.12.49-11.1
  • kernel-syms >= 3.12.49-11.1
  • kernel-xen >= 3.12.49-11.1
  • kernel-xen-devel >= 3.12.49-11.1
SUSE Linux Enterprise Desktop 12
  • kernel-default >= 3.12.51-52.31.1
  • kernel-default-devel >= 3.12.51-52.31.1
  • kernel-default-extra >= 3.12.51-52.31.1
  • kernel-devel >= 3.12.51-52.31.1
  • kernel-macros >= 3.12.51-52.31.1
  • kernel-source >= 3.12.51-52.31.1
  • kernel-syms >= 3.12.51-52.31.1
  • kernel-xen >= 3.12.51-52.31.1
  • kernel-xen-devel >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-DESKTOP-12-2015-668
SUSE-SLE-DESKTOP-12-2015-945
SUSE Linux Enterprise Live Patching 12
  • kgraft-patch-3_12_48-52_27-default >= 1-2.6
  • kgraft-patch-3_12_48-52_27-xen >= 1-2.6
  • kgraft-patch-3_12_51-52_31-default >= 1-2.2
  • kgraft-patch-3_12_51-52_31-xen >= 1-2.2
  • kgraft-patch-SLE12_Update_8 >= 1-2.6
  • kgraft-patch-SLE12_Update_9 >= 1-2.2
Patchnames:
SUSE-SLE-Live-Patching-12-2015-668
SUSE-SLE-Live-Patching-12-2015-945
SUSE Linux Enterprise Module for Public Cloud 12
  • kernel-ec2 >= 3.12.51-52.31.1
  • kernel-ec2-devel >= 3.12.51-52.31.1
  • kernel-ec2-extra >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-Module-Public-Cloud-12-2015-668
SUSE-SLE-Module-Public-Cloud-12-2015-945
SUSE Linux Enterprise Server 12 SP1
  • kernel-default >= 3.12.49-11.1
  • kernel-default-base >= 3.12.49-11.1
  • kernel-default-devel >= 3.12.49-11.1
  • kernel-default-man >= 3.12.49-11.1
  • kernel-devel >= 3.12.49-11.1
  • kernel-macros >= 3.12.49-11.1
  • kernel-source >= 3.12.49-11.1
  • kernel-syms >= 3.12.49-11.1
  • kernel-xen >= 3.12.49-11.1
  • kernel-xen-base >= 3.12.49-11.1
  • kernel-xen-devel >= 3.12.49-11.1
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
  • kernel-default >= 3.12.51-52.31.1
  • kernel-default-base >= 3.12.51-52.31.1
  • kernel-default-devel >= 3.12.51-52.31.1
  • kernel-default-man >= 3.12.51-52.31.1
  • kernel-devel >= 3.12.51-52.31.1
  • kernel-macros >= 3.12.51-52.31.1
  • kernel-source >= 3.12.51-52.31.1
  • kernel-syms >= 3.12.51-52.31.1
  • kernel-xen >= 3.12.51-52.31.1
  • kernel-xen-base >= 3.12.51-52.31.1
  • kernel-xen-devel >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-SERVER-12-2015-668
SUSE-SLE-SERVER-12-2015-945
SUSE Linux Enterprise Software Development Kit 12 SP1
  • kernel-docs >= 3.12.49-11.1
  • kernel-obs-build >= 3.12.49-11.2
SUSE Linux Enterprise Software Development Kit 12
  • kernel-docs >= 3.12.51-52.31.5
  • kernel-obs-build >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-SDK-12-2015-668
SUSE-SLE-SDK-12-2015-945
SUSE Linux Enterprise Workstation Extension 12 SP1
  • kernel-default-extra >= 3.12.49-11.1
SUSE Linux Enterprise Workstation Extension 12
  • kernel-default >= 3.12.51-52.31.1
  • kernel-default-extra >= 3.12.51-52.31.1
Patchnames:
SUSE-SLE-WE-12-2015-668
SUSE-SLE-WE-12-2015-945
openSUSE 13.1
  • cloop >= 2.639-11.23.2
  • cloop-debuginfo >= 2.639-11.23.2
  • cloop-debugsource >= 2.639-11.23.2
  • cloop-kmp-default >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-default-debuginfo >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-desktop >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-desktop-debuginfo >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-pae >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-pae-debuginfo >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-xen >= 2.639_k3.11.10_34-11.23.2
  • cloop-kmp-xen-debuginfo >= 2.639_k3.11.10_34-11.23.2
  • crash >= 7.0.2-2.23.7
  • crash-debuginfo >= 7.0.2-2.23.7
  • crash-debugsource >= 7.0.2-2.23.7
  • crash-devel >= 7.0.2-2.23.7
  • crash-doc >= 7.0.2-2.23.7
  • crash-eppic >= 7.0.2-2.23.7
  • crash-eppic-debuginfo >= 7.0.2-2.23.7
  • crash-gcore >= 7.0.2-2.23.7
  • crash-gcore-debuginfo >= 7.0.2-2.23.7
  • crash-kmp-default >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-default-debuginfo >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-desktop >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-desktop-debuginfo >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-pae >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-pae-debuginfo >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-xen >= 7.0.2_k3.11.10_34-2.23.7
  • crash-kmp-xen-debuginfo >= 7.0.2_k3.11.10_34-2.23.7
  • hdjmod >= 1.28-16.23.2
  • hdjmod-debugsource >= 1.28-16.23.2
  • hdjmod-kmp-default >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-default-debuginfo >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-desktop >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-desktop-debuginfo >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-pae >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-pae-debuginfo >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-xen >= 1.28_k3.11.10_34-16.23.2
  • hdjmod-kmp-xen-debuginfo >= 1.28_k3.11.10_34-16.23.2
  • ipset >= 6.21.1-2.27.2
  • ipset-debuginfo >= 6.21.1-2.27.2
  • ipset-debugsource >= 6.21.1-2.27.2
  • ipset-devel >= 6.21.1-2.27.2
  • ipset-kmp-default >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-default-debuginfo >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-desktop >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-desktop-debuginfo >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-pae >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-pae-debuginfo >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-xen >= 6.21.1_k3.11.10_34-2.27.2
  • ipset-kmp-xen-debuginfo >= 6.21.1_k3.11.10_34-2.27.2
  • iscsitarget >= 1.4.20.3-13.23.2
  • iscsitarget-debuginfo >= 1.4.20.3-13.23.2
  • iscsitarget-debugsource >= 1.4.20.3-13.23.2
  • iscsitarget-kmp-default >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-default-debuginfo >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-desktop >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-desktop-debuginfo >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-pae >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-pae-debuginfo >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-xen >= 1.4.20.3_k3.11.10_34-13.23.2
  • iscsitarget-kmp-xen-debuginfo >= 1.4.20.3_k3.11.10_34-13.23.2
  • kernel-debug >= 3.11.10-34.2
  • kernel-debug-base >= 3.11.10-34.2
  • kernel-debug-base-debuginfo >= 3.11.10-34.2
  • kernel-debug-debuginfo >= 3.11.10-34.2
  • kernel-debug-debugsource >= 3.11.10-34.2
  • kernel-debug-devel >= 3.11.10-34.2
  • kernel-debug-devel-debuginfo >= 3.11.10-34.2
  • kernel-default >= 3.11.10-34.2
  • kernel-default-base >= 3.11.10-34.2
  • kernel-default-base-debuginfo >= 3.11.10-34.2
  • kernel-default-debuginfo >= 3.11.10-34.2
  • kernel-default-debugsource >= 3.11.10-34.2
  • kernel-default-devel >= 3.11.10-34.2
  • kernel-default-devel-debuginfo >= 3.11.10-34.2
  • kernel-desktop >= 3.11.10-34.2
  • kernel-desktop-base >= 3.11.10-34.2
  • kernel-desktop-base-debuginfo >= 3.11.10-34.2
  • kernel-desktop-debuginfo >= 3.11.10-34.2
  • kernel-desktop-debugsource >= 3.11.10-34.2
  • kernel-desktop-devel >= 3.11.10-34.2
  • kernel-desktop-devel-debuginfo >= 3.11.10-34.2
  • kernel-devel >= 3.11.10-34.1
  • kernel-docs >= 3.11.10-34.2
  • kernel-ec2 >= 3.11.10-34.1
  • kernel-ec2-base >= 3.11.10-34.1
  • kernel-ec2-base-debuginfo >= 3.11.10-34.1
  • kernel-ec2-debuginfo >= 3.11.10-34.1
  • kernel-ec2-debugsource >= 3.11.10-34.1
  • kernel-ec2-devel >= 3.11.10-34.1
  • kernel-ec2-devel-debuginfo >= 3.11.10-34.1
  • kernel-pae >= 3.11.10-34.2
  • kernel-pae-base >= 3.11.10-34.2
  • kernel-pae-base-debuginfo >= 3.11.10-34.2
  • kernel-pae-debuginfo >= 3.11.10-34.2
  • kernel-pae-debugsource >= 3.11.10-34.2
  • kernel-pae-devel >= 3.11.10-34.2
  • kernel-pae-devel-debuginfo >= 3.11.10-34.2
  • kernel-source >= 3.11.10-34.1
  • kernel-source-vanilla >= 3.11.10-34.1
  • kernel-syms >= 3.11.10-34.1
  • kernel-trace >= 3.11.10-34.2
  • kernel-trace-base >= 3.11.10-34.2
  • kernel-trace-base-debuginfo >= 3.11.10-34.2
  • kernel-trace-debuginfo >= 3.11.10-34.2
  • kernel-trace-debugsource >= 3.11.10-34.2
  • kernel-trace-devel >= 3.11.10-34.2
  • kernel-trace-devel-debuginfo >= 3.11.10-34.2
  • kernel-vanilla >= 3.11.10-34.2
  • kernel-vanilla-debuginfo >= 3.11.10-34.2
  • kernel-vanilla-debugsource >= 3.11.10-34.2
  • kernel-vanilla-devel >= 3.11.10-34.2
  • kernel-vanilla-devel-debuginfo >= 3.11.10-34.2
  • kernel-xen >= 3.11.10-34.2
  • kernel-xen-base >= 3.11.10-34.2
  • kernel-xen-base-debuginfo >= 3.11.10-34.2
  • kernel-xen-debuginfo >= 3.11.10-34.2
  • kernel-xen-debugsource >= 3.11.10-34.2
  • kernel-xen-devel >= 3.11.10-34.2
  • kernel-xen-devel-debuginfo >= 3.11.10-34.2
  • libipset3 >= 6.21.1-2.27.2
  • libipset3-debuginfo >= 6.21.1-2.27.2
  • ndiswrapper >= 1.58-23.1
  • ndiswrapper-debuginfo >= 1.58-23.1
  • ndiswrapper-debugsource >= 1.58-23.1
  • ndiswrapper-kmp-default >= 1.58_k3.11.10_34-23.1
  • ndiswrapper-kmp-default-debuginfo >= 1.58_k3.11.10_34-23.1
  • ndiswrapper-kmp-desktop >= 1.58_k3.11.10_34-23.1
  • ndiswrapper-kmp-desktop-debuginfo >= 1.58_k3.11.10_34-23.1
  • ndiswrapper-kmp-pae >= 1.58_k3.11.10_34-23.1
  • ndiswrapper-kmp-pae-debuginfo >= 1.58_k3.11.10_34-23.1
  • pcfclock >= 0.44-258.23.1
  • pcfclock-debuginfo >= 0.44-258.23.1
  • pcfclock-debugsource >= 0.44-258.23.1
  • pcfclock-kmp-default >= 0.44_k3.11.10_34-258.23.1
  • pcfclock-kmp-default-debuginfo >= 0.44_k3.11.10_34-258.23.1
  • pcfclock-kmp-desktop >= 0.44_k3.11.10_34-258.23.1
  • pcfclock-kmp-desktop-debuginfo >= 0.44_k3.11.10_34-258.23.1
  • pcfclock-kmp-pae >= 0.44_k3.11.10_34-258.23.1
  • pcfclock-kmp-pae-debuginfo >= 0.44_k3.11.10_34-258.23.1
  • python-virtualbox >= 4.2.36-2.56.1
  • python-virtualbox-debuginfo >= 4.2.36-2.56.1
  • vhba-kmp >= 20130607-2.24.1
  • vhba-kmp-debugsource >= 20130607-2.24.1
  • vhba-kmp-default >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-default-debuginfo >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-desktop >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-desktop-debuginfo >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-pae >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-pae-debuginfo >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-xen >= 20130607_k3.11.10_34-2.24.1
  • vhba-kmp-xen-debuginfo >= 20130607_k3.11.10_34-2.24.1
  • virtualbox >= 4.2.36-2.56.1
  • virtualbox-debuginfo >= 4.2.36-2.56.1
  • virtualbox-debugsource >= 4.2.36-2.56.1
  • virtualbox-devel >= 4.2.36-2.56.1
  • virtualbox-guest-kmp-default >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-kmp-default-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-kmp-desktop >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-kmp-desktop-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-kmp-pae >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-kmp-pae-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-guest-tools >= 4.2.36-2.56.1
  • virtualbox-guest-tools-debuginfo >= 4.2.36-2.56.1
  • virtualbox-guest-x11 >= 4.2.36-2.56.1
  • virtualbox-guest-x11-debuginfo >= 4.2.36-2.56.1
  • virtualbox-host-kmp-default >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-kmp-default-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-kmp-desktop >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-kmp-desktop-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-kmp-pae >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-kmp-pae-debuginfo >= 4.2.36_k3.11.10_34-2.56.1
  • virtualbox-host-source >= 4.2.36-2.56.1
  • virtualbox-qt >= 4.2.36-2.56.1
  • virtualbox-qt-debuginfo >= 4.2.36-2.56.1
  • virtualbox-websrv >= 4.2.36-2.56.1
  • virtualbox-websrv-debuginfo >= 4.2.36-2.56.1
  • xen >= 4.3.4_10-57.1
  • xen-debugsource >= 4.3.4_10-57.1
  • xen-devel >= 4.3.4_10-57.1
  • xen-doc-html >= 4.3.4_10-57.1
  • xen-kmp-default >= 4.3.4_10_k3.11.10_34-57.1
  • xen-kmp-default-debuginfo >= 4.3.4_10_k3.11.10_34-57.1
  • xen-kmp-desktop >= 4.3.4_10_k3.11.10_34-57.1
  • xen-kmp-desktop-debuginfo >= 4.3.4_10_k3.11.10_34-57.1
  • xen-kmp-pae >= 4.3.4_10_k3.11.10_34-57.1
  • xen-kmp-pae-debuginfo >= 4.3.4_10_k3.11.10_34-57.1
  • xen-libs >= 4.3.4_10-57.1
  • xen-libs-32bit >= 4.3.4_10-57.1
  • xen-libs-debuginfo >= 4.3.4_10-57.1
  • xen-libs-debuginfo-32bit >= 4.3.4_10-57.1
  • xen-tools >= 4.3.4_10-57.1
  • xen-tools-debuginfo >= 4.3.4_10-57.1
  • xen-tools-domU >= 4.3.4_10-57.1
  • xen-tools-domU-debuginfo >= 4.3.4_10-57.1
  • xen-xend-tools >= 4.3.4_10-57.1
  • xen-xend-tools-debuginfo >= 4.3.4_10-57.1
  • xtables-addons >= 2.3-2.23.1
  • xtables-addons-debuginfo >= 2.3-2.23.1
  • xtables-addons-debugsource >= 2.3-2.23.1
  • xtables-addons-kmp-default >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-default-debuginfo >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-desktop >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-desktop-debuginfo >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-pae >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-pae-debuginfo >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-xen >= 2.3_k3.11.10_34-2.23.1
  • xtables-addons-kmp-xen-debuginfo >= 2.3_k3.11.10_34-2.23.1
Patchnames:
openSUSE-2016-124


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SLES for SAP Applications kernel-source Analysis
SUSE Linux Enterprise 15 Module for Basesystem kernel-source Analysis
SUSE Linux Enterprise 15 Module for Development Tools kernel-source Analysis
SUSE Linux Enterprise 15-SP1 Module for Basesystem kernel-source Analysis
SUSE Linux Enterprise 15-SP1 Module for Development Tools kernel-source Analysis
SUSE Linux Enterprise Desktop 11 SP3 kernel-source Not affected
SUSE Linux Enterprise Desktop 11 SP4 kernel-source Not affected
SUSE Linux Enterprise Desktop 12 kernel-source Released
SUSE Linux Enterprise Desktop 12 SP1 kernel-source Released
SUSE Linux Enterprise Desktop 12 SP3 kernel-source Analysis
SUSE Linux Enterprise Desktop 12 SP4 kernel-source Analysis
SUSE Linux Enterprise High Performance Computing 12 SP4 kernel-source Analysis
SUSE Linux Enterprise High Performance Computing 12 SP5 kernel-source Analysis
SUSE Linux Enterprise High Performance Computing 15 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 11 SP1 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP3 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP3 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 11 SP3 for VMware kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP4 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 kernel-source Released
SUSE Linux Enterprise Server 12 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP1 kernel-source Released
SUSE Linux Enterprise Server 12 SP1 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 BCL kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP3 kernel-source Analysis
SUSE Linux Enterprise Server 12 SP3 BCL kernel-source Analysis
SUSE Linux Enterprise Server 12 SP3 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP4 kernel-source Analysis
SUSE Linux Enterprise Server 12 SP5 kernel-source Analysis
SUSE Linux Enterprise Server 15 LTSS kernel-source Analysis
SUSE Linux Enterprise Server ESPOS 15 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP2 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP4 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP5 kernel-source Analysis