CVE-2016-3157

Name	CVE-2016-3157
Description	The __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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-516-1, DSA-3607-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.226-1	fixed
	bookworm	6.1.115-1	fixed
	bookworm (security)	6.1.112-1	fixed
	trixie	6.11.5-1	fixed
	sid	6.11.7-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	wheezy	3.2.81-1	DLA-516-1
linux	source	jessie	3.16.7-ckt25-2+deb8u2	DSA-3607-1
linux	source	(unstable)	4.5.1-1

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