CVE Vulnerabilities

CVE-2014-0203

Use After Free

Published: Jun 23, 2014 | Modified: Apr 12, 2025
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4.9 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
4.9 MODERATE
AV:L/AC:L/Au:N/C:N/I:N/A:C
RedHat/V3
Ubuntu
MEDIUM

The __do_follow_link function in fs/namei.c in the Linux kernel before 2.6.33 does not properly handle the last pathname component during use of certain filesystems, which allows local users to cause a denial of service (incorrect free operations and system crash) via an open system call.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Linux_kernel Linux * 2.6.33 (excluding)
Red Hat Enterprise Linux 6 RedHat kernel-0:2.6.32-431.20.3.el6 *
Linux Ubuntu lucid *
Linux Ubuntu upstream *
Linux-armadaxp Ubuntu upstream *
Linux-aws Ubuntu upstream *
Linux-ec2 Ubuntu lucid *
Linux-ec2 Ubuntu upstream *
Linux-flo Ubuntu upstream *
Linux-fsl-imx51 Ubuntu lucid *
Linux-fsl-imx51 Ubuntu upstream *
Linux-gke Ubuntu upstream *
Linux-goldfish Ubuntu saucy *
Linux-goldfish Ubuntu upstream *
Linux-grouper Ubuntu saucy *
Linux-grouper Ubuntu trusty *
Linux-grouper Ubuntu upstream *
Linux-grouper Ubuntu utopic *
Linux-hwe Ubuntu upstream *
Linux-hwe-edge Ubuntu upstream *
Linux-linaro-omap Ubuntu precise *
Linux-linaro-omap Ubuntu upstream *
Linux-linaro-shared Ubuntu precise *
Linux-linaro-shared Ubuntu upstream *
Linux-linaro-vexpress Ubuntu precise *
Linux-linaro-vexpress Ubuntu upstream *
Linux-lts-quantal Ubuntu upstream *
Linux-lts-raring Ubuntu upstream *
Linux-lts-saucy Ubuntu upstream *
Linux-lts-trusty Ubuntu upstream *
Linux-lts-utopic Ubuntu upstream *
Linux-lts-vivid Ubuntu upstream *
Linux-lts-wily Ubuntu upstream *
Linux-lts-xenial Ubuntu upstream *
Linux-maguro Ubuntu saucy *
Linux-maguro Ubuntu trusty *
Linux-maguro Ubuntu upstream *
Linux-mako Ubuntu saucy *
Linux-mako Ubuntu upstream *
Linux-manta Ubuntu saucy *
Linux-manta Ubuntu upstream *
Linux-mvl-dove Ubuntu lucid *
Linux-mvl-dove Ubuntu upstream *
Linux-qcm-msm Ubuntu lucid *
Linux-qcm-msm Ubuntu precise *
Linux-qcm-msm Ubuntu upstream *
Linux-raspi2 Ubuntu upstream *
Linux-raspi2 Ubuntu vivid/ubuntu-core *
Linux-snapdragon Ubuntu upstream *
Linux-ti-omap4 Ubuntu upstream *

Potential Mitigations

References