CVE-2014-8086
Published: 13 October 2014
Race condition in the ext4_file_write_iter function in fs/ext4/file.c in the Linux kernel through 3.17 allows local users to cause a denial of service (file unavailability) via a combination of a write action and an F_SETFL fcntl operation for the O_DIRECT flag.
From the Ubuntu security team
Dmitry Monakhov discovered a race condition in the ext4_file_write_iter function of the Linux kernel's ext4 filesystem. A local user could exploit this flaw to cause a denial of service (file unavailability).
Priority
Medium
CVSS 3 base score: 4.7
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
|
|
|
Patches: Introduced by 8ad2850f44831919f63f0e58d7203e65d5b3914c Fixed by a41537e69b4aa43f0fea02498c2595a81267383b |
||
|
linux-2.6 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-armadaxp Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-ec2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-fsl-imx51 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was released [3.16.0-26.35~14.04.1])
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored)
|
|
|
linux-mvl-dove Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.18~rc3)
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
Notes
| Author | Note |
|---|---|
| jdstrand | android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.04 preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support |
| apw | looks like the end if the discussion above on the ext4 list points to changes proposed in https://lkml.org/lkml/2014/10/18/63, unsure if they are sufficient either. this was applied with a different subject line |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8086
- http://www.spinics.net/lists/linux-ext4/msg45683.html
- https://ubuntu.com/security/notices/USN-2447-1
- https://ubuntu.com/security/notices/USN-2448-1
- NVD
- Launchpad
- Debian