CVE-2015-0239

NameCVE-2015-0239
DescriptionThe em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3170-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1fixed
wheezy (security)3.2.96-2fixed
jessie3.16.51-2fixed
jessie (security)3.16.43-2+deb8u5fixed
stretch4.9.65-3fixed
stretch (security)4.9.30-2+deb9u5fixed
buster4.13.13-1fixed
sid4.14.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)3.16.7-ckt4-2medium
linuxsourcewheezy3.2.65-1+deb7u2mediumDSA-3170-1
linux-2.6source(unstable)(unfixed)medium

Notes

[squeeze] - linux-2.6 <no-dsa> (KVM not supported in Squeeze LTS)
Introduced by: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8c60435261deaefeb53ce3222d04d7d5bea81296
Fixed by: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3747379accba8e95d70cec0eae0582c8c182050
http://permalink.gmane.org/gmane.linux.kernel.commits.head/502245

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