CVE-2016-5828

Published: 27 June 2016

The start_thread function in arch/powerpc/kernel/process.c in the Linux kernel through 4.6.3 on powerpc platforms mishandles transactional state, which allows local users to cause a denial of service (invalid process state or TM Bad Thing exception, and system crash) or possibly have unspecified other impact by starting and suspending a transaction before an exec system call.

From the Ubuntu Security Team

Cyril Bur discovered that on PowerPC platforms, the Linux kernel mishandled transactional memory state on exec(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support

Author

Note

jdstrand

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
linux-armadaxp Launchpad, Ubuntu, Debian	precise	Not vulnerable
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
	This package is not directly supported by the Ubuntu Security Team
linux-aws Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Not vulnerable (4.4.0-1002.2)
	xenial	Not vulnerable (4.4.0-1001.10)
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-flo Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Not vulnerable
	xenial	Not vulnerable
	yakkety	Not vulnerable
	upstream	Released (4.7~rc6)
linux-gke Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.4.0-1003.3)
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-goldfish Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Not vulnerable
	xenial	Not vulnerable
	yakkety	Not vulnerable
	upstream	Released (4.7~rc6)
linux-grouper Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-hwe Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-hwe-edge Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-linaro-vexpress Launchpad, Ubuntu, Debian	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
	precise	Ignored (end of life)
	trusty	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-lts-saucy Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	precise	Released (3.13.0-95.142~precise1)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-lts-utopic Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-lts-vivid Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (3.19.0-68.76~14.04.1)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-lts-wily Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-lts-xenial Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (4.4.0-36.55~14.04.1)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-maguro Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-mako Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Not vulnerable
	xenial	Not vulnerable
	yakkety	Not vulnerable
	upstream	Released (4.7~rc6)
linux-manta Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Not vulnerable
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-qcm-msm Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
	upstream	Released (4.7~rc6)
linux-raspi2 Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	wily	Ignored (end of life)
	xenial	Released (4.4.0-1021.27)
	yakkety	Not vulnerable (4.8.0-1012.14)
	upstream	Released (4.7~rc6)
linux-snapdragon Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	wily	Does not exist
	xenial	Released (4.4.0-1024.27)
	yakkety	Not vulnerable (4.4.0-1029.32)
	upstream	Released (4.7~rc6)
linux Launchpad, Ubuntu, Debian	upstream	Released (4.7~rc6)
	precise	Not vulnerable
	trusty	Released (3.13.0-95.142)
	wily	Ignored (end of life)
	xenial	Released (4.4.0-36.55)
	yakkety	Not vulnerable (4.8.0-11.12)
	Patches: Introduced by bc2a9408fa65195288b41751016c36fd00a75a85 Fixed by 8e96a87c5431c256feb65bcfc5aec92d9f7839b6
linux-ti-omap4 Launchpad, Ubuntu, Debian	upstream	Released (4.7~rc6)
	precise	Not vulnerable
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	upstream	Released (4.7~rc6)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	upstream	Released (4.7~rc6)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	yakkety	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.8
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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