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CVE-2017-7495

Published: 15 May 2017

fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file.

From the Ubuntu security team

Huang Weller discovered that the ext4 filesystem implementation in the Linux kernel mishandled a needs-flushing-before-commit list. A local attacker could use this to expose sensitive information.

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
Patches:
Introduced by f3b59291a69d0b734be1fc8be489fef2dd846d3d
Fixed by 06bd3c36a733ac27962fea7d6f47168841376824
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.7~rc1)