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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | guile-2.0 | 2.0.5+1-3+deb7u1 | DLA-666-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | guile-1.8 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | guile1 | 1.8.8-16.4.39 | SUSE-SU-2020:1659-1 |
| SLES 12 SP4 | guile1 | 1.8.8-16.4.39 | SUSE-SU-2020:1659-1 |
| SLES 12 SP2 | guile | 2.0.9-8.3 | SUSE-SU-2017:0398-1 |
| SLES 12 SP1 | guile | 2.0.9-8.3 | SUSE-SU-2017:0398-1 |
| SLES 11 SP4 | guile | 1.8.5-24.1 | SUSE-SU-2017:0394-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | guile | 2.0.9-8.3 | SUSE-SU-2017:0398-1 |
| SLES for SAP 12 SP1 | guile | 2.0.9-8.3 | SUSE-SU-2017:0398-1 |
| SLES for SAP 11 SP4 | guile | 1.8.5-24.1 | SUSE-SU-2017:0394-1 |
| SUSE Package Hub 15 SP4 | guile1 | 2.2.6-bp154.3.3.1 | openSUSE-SU-2023:0137-1 |
| SUSE Package Hub 15 SP4 | lilypond | 2.24.1-bp154.2.3.2 | openSUSE-SU-2023:0137-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | guile | 2.0.13-2.1 | openSUSE-SU-2024:10389-1 |
| openSUSE Leap 15.4 | guile1 | 2.2.6-bp154.3.3.1 | openSUSE-SU-2023:0137-1 |
| openSUSE Leap 15.4 | lilypond | 2.24.1-bp154.2.3.2 | openSUSE-SU-2023:0137-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | guile | 2.0.11-r3 | — |
Advisories 6
- DLA-666-1 guile-2.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:0394-1 Security update for guile SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2023:0137-1 Security update for guile1, lilypond SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1659-1 Security update for guile SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10389-1 guile-2.0.13-2.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2017:0398-1 Security update for guile SUSE / openSUSE Security Updates · May 2, 2025
References
- FEDORA-2016-0aab71f552 vendor-advisory
- FEDORA-2016-34209c3a8e vendor-advisory
- FEDORA-2016-a47bf58beb vendor-advisory
- 93510 vdb-entry
- [oss-security] 20161012 Re: CVE request: GNU Guile <= 2.0.12: Thread-unsafe umask modification mailing-list