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Fencer Intel
medium 5.3

CVE-2016-8605 json

The mkdir procedure of GNU Guile temporarily changed the process' umask to zero.

published 2017-01-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9452

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

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.

Patch / fix

  • guile1 SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 1.8.8-16.4.39
  • guile SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +6 more 2.0.9-8.3
  • guile SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 1.8.5-24.1

suse advisories SUSE-SU-2020:1659-1SUSE-SU-2017:0398-1SUSE-SU-2017:0394-1

  • guile openSUSE Tumbleweed 2.0.13-2.1
  • lilypond Package Hub 15 SP4, openSUSE Leap 15.4 2.24.1-bp154.2.3.2
  • guile1 Package Hub 15 SP4, openSUSE Leap 15.4 2.2.6-bp154.3.3.1

opensuse advisories openSUSE-SU-2024:10389-1openSUSE-SU-2023:0137-1

  • guile Alpine 3.4 2.0.11-r3

alpine advisories ALPINE-CVE-2016-8605

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • guile Arch Linux 2.0.13-1

arch linux advisories AVG-47

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-8605 updated cvss 2.5

guile: Thread-unsafe umask modification

  • Red Hat Enterprise Linux 5 guile Red Hat Enterprise Linux 6 guile Red Hat Enterprise Linux 7 guile
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.77% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.