CVE-2017-18221

Published: 7 March 2018

The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system calls.

From the Ubuntu Security Team

Kefeng Wang discovered that a race condition existed in the memory locking implementation in the Linux kernel. A local attacker could use this to cause a denial of service.

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	artful	Not vulnerable (4.11.0-10.15)
	bionic	Not vulnerable (4.13.0-16.19)
	trusty	Pending (3.13.0-149.199)
	upstream	Released (4.12~rc4)
	xenial	Released (4.4.0-87.110)
	Patches: Introduced by 1ebb7cc6a58321a4b22c4c9097b4651b0ab859d0 Fixed by 70feee0e1ef331b22cc51f383d532a0d043fbdcc
linux-armadaxp Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-aws Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1001.1)
	trusty	Not vulnerable (4.4.0-1002.2)
	upstream	Released (4.12~rc4)
	xenial	Released (4.4.0-1026.35)
linux-azure Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.2)
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	upstream	Released (4.12~rc4)
	xenial	Not vulnerable (4.11.0-1009.9)
linux-euclid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Ignored (was needed ESM criteria)
linux-flo Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Ignored (abandoned)
linux-gcp Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1001.1)
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.13.0-1002.5)
linux-gke Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.4.0-1022.22)
linux-goldfish Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Not vulnerable
linux-grouper Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.13.0-26.29~16.04.2)
linux-hwe-edge Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Released (4.18.0-8.9~18.04.1)
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.13.0-26.29~16.04.2)
linux-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.2)
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Not vulnerable (4.4.0-1004.9)
linux-linaro-omap Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-raring Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Ignored (end of life, was needs-triage)
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Released (4.4.0-87.110~14.04.1)
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Ignored (abandoned)
linux-manta Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Not vulnerable (4.15.0-1002.3)
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Not vulnerable (4.13.0-1008.9)
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	artful	Not vulnerable (4.13.0-1004.4)
	bionic	Not vulnerable (4.13.0-1005.5)
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.4.0-1065.73)
linux-snapdragon Launchpad, Ubuntu, Debian	artful	Not vulnerable (4.4.0-1067.72)
	bionic	Not vulnerable
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Released (4.4.0-1067.72)
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	trusty	Does not exist
	upstream	Released (4.12~rc4)
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	5.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

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