DescriptionThe handle_dr function in arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service (trap) on the host OS via a crafted application.
SourceCVE (at NVD; oss-sec, fulldisc, OSVDB, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, web search, more)
NVD severityhigh (attack range: remote, user-initiated)
Debian Bugs557739
Debian/oldoldstablenot vulnerable.
Debian/oldstablenot known to be vulnerable.
Debian/stablenot known to be vulnerable.
Debian/testingnot known to be vulnerable.
Debian/unstablenot known to be vulnerable.

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux-2.6 (PTS)squeeze, squeeze (security)2.6.32-48squeeze6fixed
squeeze (lts)2.6.32-48squeeze16fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linux-2.6sourceetch(not affected)
linux-2.6sourcelenny(not affected)


[etch] - linux-2.6 <not-affected> (issue introduced in 2.6.30-rc1)
[lenny] - linux-2.6 <not-affected> (issue introduced in 2.6.30-rc1)

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