CVE-2016-8605: The mkdir procedure of GNU Guile temporarily changed the process' umask to zero. During that time window, in a multithreaded application, other thread...

Description

The mkdir procedure of GNU Guile temporarily changed the process' umask to zero. During that time window, in a multithreaded application, other threads could end up creating files with insecure permissions. For example, mkdir without the optional mode argument would create directories as 0777. This is fixed in Guile 2.0.13. Prior versions are affected.

Metrics

EPSS Probability

2.88%

85.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-275

Affected Software

Vendor	Product	Versions
Fedoraproject	Fedora	23
Fedoraproject	Fedora	24
Fedoraproject	Fedora	25
Gnu	Guile	<= 2.0.12

References

Timeline

Published: Jan 12, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-8605?

The mkdir procedure of GNU Guile temporarily changed the process' umask to zero. During that time window, in a multithreaded application, other threads could end up creating files with insecure permissions. For example, mkdir without the optional mode argument would create directories as 0777. This is fixed in Guile 2.0.13. Prior versions are affected.

How severe is CVE-2016-8605?

Severity scoring for CVE-2016-8605 is pending analysis. The EPSS model estimates a 2.88% probability of exploitation in the next 30 days.

How do I fix CVE-2016-8605?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.