CVE-2014-2667
python: os.makedirs(exist_ok=True) is not thread-safe in Python 3.x
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · March 28, 2014
Updated · November 21, 2025
Description
Race condition in the _get_masked_mode function in Lib/os.py in Python 3.2 through 3.5, when exist_ok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the expected value.
Statement
Not vulnerable. This issue did not affect the versions of python as shipped with Red Hat Enterprise Linux 5 and 6.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P
CWE not specified