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
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.10.0-19.21)
|
| trusty |
Released
(3.13.0-129.178)
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-93.116)
|
|
| yakkety |
Not vulnerable
(4.8.0-11.12)
|
|
| zesty |
Not vulnerable
(4.8.0-22.24)
|
|
|
Patches: Introduced by f3b59291a69d0b734be1fc8be489fef2dd846d3d |
||
|
linux-armadaxp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Not vulnerable
(4.4.0-1002.2)
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-1032.41)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
| zesty |
Does not exist
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Ignored
(abandoned)
|
|
| yakkety |
Ignored
(end of life)
|
|
| zesty |
Does not exist
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
(4.10.0-1004.4)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-1028.28)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
|
|
| yakkety |
Not vulnerable
|
|
| zesty |
Not vulnerable
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
(4.8.0-36.36~16.04.1)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
(4.8.0-36.36~16.04.1)
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-1007.12)
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Ignored
(end of life, was needed)
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Released
(4.4.0-93.116~14.04.1)
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Ignored
(abandoned)
|
|
| yakkety |
Ignored
(end of life)
|
|
| zesty |
Does not exist
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Not vulnerable
(4.13.0-1008.9)
|
|
| zesty |
Does not exist
|
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.10.0-1004.6)
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-1071.79)
|
|
| yakkety |
Not vulnerable
(4.8.0-1012.14)
|
|
| zesty |
Not vulnerable
(4.8.0-1013.15)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.4.0-1073.78)
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Released
(4.4.0-1073.78)
|
|
| yakkety |
Ignored
(end of life)
|
|
| zesty |
Released
(4.4.0-1073.78)
|
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.7~rc1)
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
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 | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2
- http://www.openwall.com/lists/oss-security/2017/05/15/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1450261
- https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824
- https://ubuntu.com/security/notices/USN-3406-1
- https://ubuntu.com/security/notices/USN-3405-1
- https://ubuntu.com/security/notices/USN-3405-2
- https://ubuntu.com/security/notices/USN-3406-2
- https://www.cve.org/CVERecord?id=CVE-2017-7495
- NVD
- Launchpad
- Debian