CVE-2017-18224

Published: 12 March 2018

In the Linux kernel before 4.15, fs/ocfs2/aops.c omits use of a semaphore and consequently has a race condition for access to the extent tree during read operations in DIRECT mode, which allows local users to cause a denial of service (BUG) by modifying a certain e_cpos field.

Priority

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-10.11)
	artful	Ignored (end of life)
	cosmic	Not vulnerable (4.15.0-20.21)
	trusty	Not vulnerable
	xenial	Not vulnerable
	Patches: Introduced by c15471f79506830f80eca0e7fe09b8213953ab5f Fixed by 3e4c56d41eef5595035872a2ec5a483f42e8917f
linux-linaro-omap Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Does not exist
linux-armadaxp Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-goldfish Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Not vulnerable
linux-grouper Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Does not exist
linux-manta Launchpad, Ubuntu, Debian	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-flo Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	xenial	Ignored (abandoned)
linux-raspi2 Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1006.7)
	artful	Ignored (end of life)
	cosmic	Not vulnerable (4.15.0-1010.11)
	trusty	Does not exist
	xenial	Not vulnerable
linux-lts-utopic Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Ignored (end of life, was needs-triage)
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [end of standard support])
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Not vulnerable
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable
	artful	Not vulnerable
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable
linux-aws Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1001.1)
	artful	Does not exist
	cosmic	Not vulnerable (4.15.0-1007.7)
	trusty	Not vulnerable
	xenial	Not vulnerable
linux-hwe Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Released (4.15.0-24.26~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.18.0-8.9~18.04.1)
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Released (4.15.0-24.26~16.04.1)
linux-gke Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable
linux-azure Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1002.2)
	artful	Does not exist
	cosmic	Not vulnerable (4.15.0-1009.9)
	trusty	Not vulnerable (4.15.0-1023.24~14.04.1)
	xenial	Released (4.15.0-1013.13~16.04.2)
linux-gcp Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1001.1)
	artful	Does not exist
	cosmic	Not vulnerable (4.15.0-1006.6)
	trusty	Does not exist
	xenial	Released (4.15.0-1014.14~16.04.1)
linux-kvm Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1002.2)
	artful	Does not exist
	cosmic	Not vulnerable (4.15.0-1008.8)
	trusty	Does not exist
	xenial	Not vulnerable
linux-euclid Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Does not exist
	artful	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Ignored (was needed ESM criteria)
linux-oem Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.15.0-1002.3)
	artful	Does not exist
	cosmic	Not vulnerable (4.15.0-1004.5)
	trusty	Does not exist
	xenial	Ignored (end of standard support, was needed)
linux-azure-edge Launchpad, Ubuntu, Debian	upstream	Released (4.15~rc1)
	bionic	Not vulnerable (4.18.0-1003.3~18.04.1)
	cosmic	Does not exist
	trusty	Does not exist
	xenial	Not vulnerable (4.15.0-1002.2)
linux-linaro-vexpress Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	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
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-lts-saucy Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	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
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist (trusty was ignored [abandoned])
	upstream	Released (4.15~rc1)
	xenial	Ignored (abandoned)
linux-qcm-msm Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	xenial	Does not exist
linux-ti-omap4 Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	trusty	Does not exist
	upstream	Released (4.15~rc1)
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	4.7
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

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