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    CVE-2006-5755

    Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.

    Published:Sep 26, 2006
    Last Modified:Apr 23, 2026
    EPS:Jan 9, 2007
    EPSS Score:0.00067
    CVSS Score:4.9

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
    http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
    http://secunia.com/advisories/24098
    http://secunia.com/advisories/25691
    http://secunia.com/advisories/26620
    http://secunia.com/advisories/26994
    http://secunia.com/advisories/32485
    http://www.debian.org/security/2007/dsa-1381
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18
    http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.18-git13.log
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
    http://www.redhat.com/support/errata/RHSA-2008-0957.html
    http://www.securityfocus.com/archive/1/471457
    http://www.securityfocus.com/bid/26060
    http://www.ubuntu.com/usn/usn-416-1
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9554
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
    http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
    http://secunia.com/advisories/24098
    http://secunia.com/advisories/25691
    http://secunia.com/advisories/26620
    http://secunia.com/advisories/26994
    http://secunia.com/advisories/32485
    http://www.debian.org/security/2007/dsa-1381
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.18
    http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.18-git13.log
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
    http://www.redhat.com/support/errata/RHSA-2008-0957.html
    http://www.securityfocus.com/archive/1/471457
    http://www.securityfocus.com/bid/26060
    http://www.ubuntu.com/usn/usn-416-1
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9554

    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