CVE-2016-7039

Published: 10 October 2016

The IP stack in the Linux kernel through 4.8.2 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly have unspecified other impact by triggering use of the GRO path for large crafted packets, as demonstrated by packets that contain only VLAN headers, a related issue to CVE-2016-8666.

From the Ubuntu Security Team

Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB Generic Receive Offload (GRO) processing implementations in the Linux kernel, A remote attacker could use this to cause a stack corruption, leading to a denial of service (system crash).

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
sbeattie	third break-fix may get split out into a separate CVE.

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

sbeattie

third break-fix may get split out into a separate CVE.

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	precise	Not vulnerable
	trusty	Not vulnerable
	upstream	Released (4.9~rc4)
	xenial	Released (4.4.0-42.62)
	yakkety	Not vulnerable (4.8.0-22.24)
	Patches: Introduced by 9b174d88c257150562b0101fcc6cb6c3cb74275c Fixed by fcd91dd449867c6bfe56a81cabba76b829fd05cd Introduced by 66e5133f19e901a044fa5eaeeb6ecff4545839e5 Fixed by fcd91dd449867c6bfe56a81cabba76b829fd05cd
linux-armadaxp Launchpad, Ubuntu, Debian	precise	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
	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)
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable (4.4.0-1001.10)
	yakkety	Does not exist
linux-flo Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable
	yakkety	Not vulnerable
linux-gke Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable (4.4.0-1003.3)
	yakkety	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable
	yakkety	Not vulnerable
linux-grouper Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
linux-hwe-edge Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
	yakkety	Does not exist
linux-linaro-omap Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
	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
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	precise	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected)
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Released (4.4.0-42.62~14.04.1)
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-mako Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Not vulnerable
	yakkety	Not vulnerable
linux-manta Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-qcm-msm Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Released (4.4.0-1027.33)
	yakkety	Not vulnerable (4.8.0-1013.15)
linux-snapdragon Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Released (4.4.0-1030.33)
	yakkety	Released (4.4.0-1032.36)
linux-ti-omap4 Launchpad, Ubuntu, Debian	precise	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.9~rc4)
	xenial	Does not exist
	yakkety	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Bugs

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1631287

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›