CVE-2016-3157

NameCVE-2016-3157
DescriptionThe __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-516-1, DSA-3607-1
NVD severityhigh (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1fixed
jessie (security)3.16.57-2fixed
stretch4.9.110-1fixed
stretch (security)4.9.88-1+deb9u1fixed
buster4.16.16-2fixed
sid4.17.8-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.5.1-1high
linuxsourcejessie3.16.7-ckt25-2+deb8u2highDSA-3607-1
linuxsourcewheezy3.2.81-1highDLA-516-1

Notes

http://xenbits.xen.org/xsa/advisory-171.html
https://git.kernel.org/linus/b7a584598aea7ca73140cb87b40319944dd3393f

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