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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-516-1, DSA-3607-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)bullseye5.10.223-1fixed
bullseye (security)5.10.226-1fixed
bookworm6.1.115-1fixed
bookworm (security)6.1.119-1fixed
trixie6.11.10-1fixed
sid6.12.3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcewheezy3.2.81-1DLA-516-1
linuxsourcejessie3.16.7-ckt25-2+deb8u2DSA-3607-1
linuxsource(unstable)4.5.1-1

Notes

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

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